diff --git a/it4i_theme/base.html b/it4i_theme/base.html
index 24990eb53f91372b93d7b67507b533368ea75be9..5238fd148d1be25d0aa26d3b638e2c365b6e7459 100644
--- a/it4i_theme/base.html
+++ b/it4i_theme/base.html
@@ -1,13 +1,20 @@
 <!DOCTYPE html>
-<!--[if lt IE 7 ]><html class="no-js ie6"><![endif]-->
-<!--[if IE 7 ]><html class="no-js ie7"><![endif]-->
-<!--[if IE 8 ]><html class="no-js ie8"><![endif]-->
-<!--[if IE 9 ]><html class="no-js ie9"><![endif]-->
+<!--[if lt IE 7 ]> <html class="no-js ie6"> <![endif]-->
+<!--[if IE 7 ]>    <html class="no-js ie7"> <![endif]-->
+<!--[if IE 8 ]>    <html class="no-js ie8"> <![endif]-->
+<!--[if IE 9 ]>    <html class="no-js ie9"> <![endif]-->
 <!--[if (gt IE 9)|!(IE)]><!--> <html class="no-js"> <!--<![endif]-->
   <head>
-    <meta charset="utf-8">
-    <meta name="viewport" content="width=device-width,user-scalable=no,initial-scale=1,maximum-scale=1">
+
+    <!-- Charset and viewport -->
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width,
+      user-scalable=no, initial-scale=1, maximum-scale=1" />
+
+    <!-- General meta tags -->
     {% block htmltitle %}
+
+      <!-- Site title -->
       {% if page_title %}
         <title>{{ page_title }} - {{ site_name }}</title>
       {% elif page_description %}
@@ -15,28 +22,49 @@
       {% else %}
         <title>{{ site_name }}</title>
       {% endif %}
+
+      <!-- Site description -->
       {% if page_description %}
-        <meta name="description" content="{{ page_description }}">
+        <meta name="description" content="{{ page_description }}" />
       {% endif %}
+
+      <!-- Canonical -->
       {% if canonical_url %}
-        <link rel="canonical" href="{{ canonical_url }}">
+        <link rel="canonical" href="{{ canonical_url }}" />
       {% endif %}
+
+      <!-- Author -->
       {% if site_author %}
-        <meta name="author" content="{{ site_author }}">
+        <meta name="author" content="{{ site_author }}" />
       {% endif %}
     {% endblock %}
-    <meta property="og:url" content="{{ canonical_url }}">
-    <meta property="og:title" content="{{ site_name }}">
-    <meta property="og:image" content="{{ canonical_url }}/{{ base_url }}/{{ config.extra.logo }}">
-    <meta name="apple-mobile-web-app-title" content="{{ site_name }}">
-    <meta name="apple-mobile-web-app-capable" content="yes">
-    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+
+    <!-- Open graph tags -->
+    <meta property="og:url" content="{{ canonical_url }}" />
+    <meta property="og:title" content="{{ site_name }}"/>
+    <meta property="og:image"
+      content="{{ canonical_url }}/{{ base_url }}/{{ config.extra.logo }}" />
+
+    <!-- Web application capability on iOS -->
+    <meta name="apple-mobile-web-app-title" content="{{ site_name }}" />
+    <meta name="apple-mobile-web-app-capable" content="yes" />
+    <meta name="apple-mobile-web-app-status-bar-style"
+      content="black-translucent" />
+
+    <!-- Web application icon on iOS -->
     {% if config.extra.logo %}
-      <link rel="apple-touch-icon" href="{{ base_url }}/{{ config.extra.logo }}">
+      <link rel="apple-touch-icon"
+        href="{{ base_url }}/{{ config.extra.logo }}">
     {% endif %}
+
+    <!-- Favicon -->
     {% set favicon = favicon | default("assets/images/favicon.ico", true) %}
-    <link rel="shortcut icon" type="image/x-icon" href="{{ base_url }}/{{ favicon }}">
-    <link rel="icon" type="image/x-icon" href="{{ base_url }}/{{ favicon }}">
+    <link rel="shortcut icon" type="image/x-icon"
+      href="{{ base_url }}/{{ favicon }}" />
+    <link rel="icon" type="image/x-icon"
+      href="{{ base_url }}/{{ favicon }}" />
+
+    <!-- Configure icons (placed here to omit issues with subdirectories) -->
     <style>
       @font-face {
       	font-family: 'Icon';
@@ -53,15 +81,24 @@
       	font-style: normal;
       }
     </style>
-    <link rel="stylesheet" href="{{ base_url }}/assets/stylesheets/application.css">
+
+    <!-- Theme-related stylesheets -->
+    <link rel="stylesheet" type="text/css"
+      href="{{ base_url }}/assets/stylesheets/application.css" />
+
+    <!-- Extra palettes -->
     {% if config.extra.palette %}
-      <link rel="stylesheet" href="{{ base_url }}/assets/stylesheets/palettes.css">
+      <link rel="stylesheet" type="text/css"
+        href="{{ base_url }}/assets/stylesheets/palettes.css" />
     {% endif %}
+
+    <!-- Configure webfonts -->
     {% if config.extra.font != "none" %}
       {% set text = config.extra.get("font", {}).text | default("Ubuntu") %}
       {% set code = config.extra.get("font", {}).code | default("Ubuntu Mono") %}
       {% set font = text + ':400,700|' + code | replace(' ', '+') %}
-      <link rel="stylesheet" href="https://fonts.googleapis.com/css?family={{ font }}">
+      <link rel="stylesheet" type="text/css"
+        href="https://fonts.googleapis.com/css?family={{ font }}" />
       <style>
         body, input {
           font-family: '{{ text }}', Helvetica, Arial, sans-serif;
@@ -71,42 +108,86 @@
         }
       </style>
     {% endif %}
+
+    <!-- Custom stylesheets -->
     {% for path in extra_css %}
-      <link rel="stylesheet" href="{{ path }}">
+      <link rel="stylesheet" type="text/css" href="{{ path }}" />
     {% endfor %}
+
+    <!-- Modernizr -->
     <script src="{{ base_url }}/assets/javascripts/modernizr.js"></script>
+
+    <!-- Custom header -->
     {% block extrahead %}{% endblock %}
   </head>
+
+  <!-- Define palette -->
   {% set palette = config.extra.get("palette", {}) %}
   {% set primary = palette.primary | replace(' ', '-') | lower %}
   {% set accent  = palette.accent  | replace(' ', '-') | lower %}
-  <body class="{% if primary %}palette-primary-{{ primary }}{% endif %} {% if accent %}palette-accent-{{ accent }}{% endif %}">
+  <body class="
+    {% if primary %}palette-primary-{{ primary }}{% endif %}
+    {% if accent %}palette-accent-{{ accent }}{% endif %}
+  ">
+
+    <!--
+      Sadly the jinja template engine is not very flexible - it doesn't support
+      regular expressions out-of-the-box. Since there might be a slash at the
+      end of the repository name, we just do a string comparison and kill it.
+    -->
     {% if repo_name == "GitHub" and repo_url %}
       {% set repo_id = repo_url | replace("https://github.com/", "") %}
       {% if repo_id[-1:] == "/" %}
         {% set repo_id = repo_id[:-1] %}
       {% endif %}
     {% endif %}
+
+    <!-- Backdrop -->
     <div class="backdrop">
       <div class="backdrop-paper"></div>
     </div>
-    <input class="toggle" type="checkbox" id="toggle-drawer">
-    <input class="toggle" type="checkbox" id="toggle-search">
+
+    <!-- State toggles -->
+    <input class="toggle" type="checkbox" id="toggle-drawer" />
+    <input class="toggle" type="checkbox" id="toggle-search" />
+
+    <!-- Overlay for expanded drawer -->
     <label class="toggle-button overlay" for="toggle-drawer"></label>
+
+    <!-- Header -->
     <header class="header">
       {% include "header.html" %}
     </header>
+
+    <!-- Main content -->
     <main class="main">
+
+      <!--
+        This is a nasty hack that checks whether the content contains a
+        h1 headline. If it does, the variable h1 is set to true. This is
+        necessary for correctly rendering the table of contents which is
+        embedded into the navigation and the actual headline.
+      -->
       {% set h1 = "\x3ch1 id=" in content %}
+
+      <!-- Drawer with navigation -->
       <div class="drawer">
         {% include "drawer.html" %}
       </div>
+
+      <!-- Article -->
       <article class="article">
         <div class="wrapper">
+
+          <!-- Headline -->
           {% if not h1 %}
             <h1>{{ page_title | default(site_name, true)}}</h1>
           {% endif %}
+
+          <!-- Article content -->
           {{ content }}
+
+          <!-- Copyright and theme information -->
           <aside class="copyright" role="note">
             {% if copyright %}
               {{ copyright }} &ndash;
@@ -114,11 +195,14 @@
             Documentation built with
             <a href="http://www.mkdocs.org" target="_blank">MkDocs</a>
             using the
-            <a href="http://squidfunk.github.io/mkdocs-material/" target="_blank">
+            <a href="http://squidfunk.github.io/mkdocs-material/"
+              target="_blank">
               Material
             </a>
             theme.
           </aside>
+
+          <!-- Footer -->
           {% block footer %}
             <footer class="footer">
               {% include "footer.html" %}
@@ -126,6 +210,8 @@
           {% endblock %}
         </div>
       </article>
+
+      <!-- Search results -->
       <div class="results" role="status" aria-live="polite">
         <div class="scrollable">
           <div class="wrapper">
@@ -135,6 +221,8 @@
         </div>
       </div>
     </main>
+
+    <!-- Theme-related and custom javascripts -->
     <script>
       var base_url = '{{ base_url }}';
       var repo_id  = '{{ repo_id }}';
@@ -143,6 +231,8 @@
     {% for path in extra_javascript %}
       <script src="{{ path }}"></script>
     {% endfor %}
+
+    <!-- Google Analytics -->
     {% if google_analytics %}
       <script>
         (function(i,s,o,g,r,a,m){
@@ -152,10 +242,12 @@
           m.parentNode.insertBefore(a,m)
         })(window, document,
           'script', 'https://www.google-analytics.com/analytics.js', 'ga');
+
         /* General initialization */
         ga('create', '{{ google_analytics[0] }}', '{{ google_analytics[1] }}');
         ga('set', 'anonymizeIp', true);
         ga('send', 'pageview');
+
         /* Track outbound links */
         var buttons = document.querySelectorAll('a');
         Array.prototype.map.call(buttons, function(item) {
@@ -166,6 +258,7 @@
             });
           }
         });
+
         /* Register handler to log search on blur */
         var query = document.querySelector('.query');
         query.addEventListener('blur', function() {
@@ -177,4 +270,4 @@
       </script>
     {% endif %}
   </body>
-</html>
+</html>
\ No newline at end of file
diff --git a/it4i_theme/drawer.html b/it4i_theme/drawer.html
index 0186b8b79ab8c731e3d2eba18c5231d3baafdc6e..c00aaefd63e5e81e41c25877b82f01afcaaa6780 100644
--- a/it4i_theme/drawer.html
+++ b/it4i_theme/drawer.html
@@ -1,32 +1,101 @@
+<!-- Navigation -->
 <nav aria-label="Navigation">
   {% set home = repo_url | default("/", true) %}
+
+  <!-- Project information -->
   <a href="{{ home }}" class="project">
+
+    <!-- Name and logo -->
     <div class="banner">
+
+      <!-- Version -->
       {% if config.extra.logo %}
         <div class="logo">
-          <img src="{{ base_url }}/{{ config.extra.logo }}">
+          <img src="{{ base_url }}/{{ config.extra.logo }}" />
         </div>
       {% endif %}
+
+      <!-- Project name and verison -->
+      <div class="name">
+        <strong>
+          {{ site_name }}
+          <span class="version">
+            {{ config.extra.version }}
+          </span>
+        </strong>
+
+        <!-- Project repository name -->
+        {% if repo_id %}
+          <br />
+          {{ repo_id }}
+        {% endif %}
+      </div>
     </div>
   </a>
+
+  <!-- Repository and table of contents -->
   <div class="scrollable">
     <div class="wrapper">
+
+      <!-- Repository -->
+      {% if repo_name == "GitHub" and repo_url %}
         <ul class="repo">
           <li class="repo-download">
             {% set version = config.extra.version | default("master") %}
-            <a href="pbspro-documentation/pbspro-programmers-guide.pdf" target="_blank" title="DOWNLOAD PDF VERSION" data-action="download">
-              <i class="icon icon-download"></i> DOWNLOAD PDF VERSION
+            <a href="{{ repo_url }}/archive/{{ version }}.zip" target="_blank"
+              title="Download" data-action="download">
+              <i class="icon icon-download"></i> Download
             </a>
           </li>
-          </ul>
-        <hr>
+          <li class="repo-stars">
+            <a href="{{ repo_url }}/stargazers" target="_blank"
+              title="Stargazers" data-action="star">
+              <i class="icon icon-star"></i> Stars
+              <span class="count">&ndash;</span>
+            </a>
+          </li>
+        </ul>
+        <hr />
+      {% endif %}
+
+      <!-- Table of contents -->
       <div class="toc">
         <ul>
           {% for nav_item in nav %}
             {% include "nav.html" %}
           {% endfor %}
         </ul>
+
+        <!-- Author-related links -->
+        {% if config.extra.author %}
+          <hr />
+          <span class="section">The author</span>
+          <ul>
+
+            <!-- Twitter -->
+            {% if config.extra.author.twitter %}
+              {% set author = config.extra.author.twitter %}
+              <li>
+                <a href="https://twitter.com/{{ author }}" target="_blank"
+                  title="@{{ author }} on Twitter">
+                  @{{ author }} on Twitter
+                </a>
+              </li>
+            {% endif %}
+
+            <!-- GitHub -->
+            {% if config.extra.author.github %}
+              {% set author = config.extra.author.github %}
+              <li>
+                <a href="https://github.com/{{ author }}" target="_blank"
+                  title="@{{ author }} on GitHub">
+                  @{{ author }} on GitHub
+                </a>
+              </li>
+            {% endif %}
+          </ul>
+        {% endif %}
       </div>
     </div>
   </div>
-</nav>
+</nav>
\ No newline at end of file
diff --git a/it4i_theme/footer.html b/it4i_theme/footer.html
index 660b28f675bed601c659042ae28edc4e8001cbf5..01251554198e45df6c9cf2f033582f2728b6e9f3 100644
--- a/it4i_theme/footer.html
+++ b/it4i_theme/footer.html
@@ -1,5 +1,8 @@
+<!-- Previous and next page -->
 {% if include_next_prev %}
-  <nav class="pagination" aria-label="Footer">
+  <nav class="pagination"  aria-label="Footer">
+
+    <!-- Previous page -->
     <div class="previous">
       {% if previous_page %}
         <a href="{{ previous_page.url }}" title="{{ previous_page.title }}">
@@ -7,7 +10,8 @@
             {{ config.extra.get("i18n", {}).prev | default("Previous") }}
           </span>
           <div class="page">
-            <div class="button button-previous" role="button" aria-label="Previous">
+            <div class="button button-previous"
+              role="button" aria-label="Previous">
               <i class="icon icon-back"></i>
             </div>
             <div class="stretch">
@@ -19,6 +23,8 @@
         </a>
       {% endif %}
     </div>
+
+    <!-- Next page -->
     <div class="next">
       {% if next_page %}
         <a href="{{ next_page.url }}" title="{{ next_page.title }}">
diff --git a/it4i_theme/header.html b/it4i_theme/header.html
index 564d0b8fbab2082a6e0bb399e2eff42d4ed9c51f..dc2a0e434ea7c51122158a4a79255bd2c48a517a 100644
--- a/it4i_theme/header.html
+++ b/it4i_theme/header.html
@@ -1,10 +1,17 @@
+<!-- Top-level navigation -->
 <nav aria-label="Header">
+
+  <!-- Default bar -->
   <div class="bar default">
+
+    <!-- Toggle drawer -->
     <div class="button button-menu" role="button" aria-label="Menu">
       <label class="toggle-button icon icon-menu" for="toggle-drawer">
         <span></span>
       </label>
     </div>
+
+    <!-- Page title -->
     <div class="stretch">
       <div class="title">
         {% if current_page %}
@@ -22,24 +29,56 @@
         {{ page_title | default(site_name, true) }}
       </div>
     </div>
+
+    <!-- Twitter -->
+    {% if config.extra.get("author", {}).twitter %}
+      {% set author = config.extra.author.twitter %}
+      <div class="button button-twitter" role="button" aria-label="Twitter">
+        <a href="https://twitter.com/{{ author }}"
+          title="@{{ author }} on Twitter" target="_blank"
+          class="toggle-button icon icon-twitter"></a>
+      </div>
+    {% endif %}
+
+    <!-- GitHub -->
+    {% if config.extra.get("author", {}).github %}
+      {% set author = config.extra.author.github %}
       <div class="button button-github" role="button" aria-label="GitHub">
-        <a href="https://gitlab.it4i.cz/kru0052/docs.it4i" title="on GitLab" target="_blank" ><img src="/img/git.png" width="30" height="30"></a>
+        <a href="https://github.com/{{ author }}"
+          title="@{{ author }} on GitHub" target="_blank"
+          class="toggle-button icon icon-github"></a>
       </div>
+    {% endif %}
+
+    <!-- Open search -->
     <div class="button button-search" role="button" aria-label="Search">
-      <label class="toggle-button icon icon-search" title="Search" for="toggle-search"></label>
+      <label class="toggle-button icon icon-search" title="Search"
+        for="toggle-search"></label>
     </div>
   </div>
+
+  <!-- Search bar -->
   <div class="bar search">
+
+    <!-- Close search -->
     <div class="button button-close" role="button" aria-label="Close">
-      <label class="toggle-button icon icon-back" for="toggle-search"></label>
+      <label class="toggle-button icon icon-back"
+        for="toggle-search"></label>
     </div>
+
+    <!-- Search form -->
     <div class="stretch">
       <div class="field">
-        <input class="query" type="text" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck>
+        <input class="query" type="text" placeholder="Search"
+          autocapitalize="off" autocorrect="off" autocomplete="off"
+          spellcheck="false" />
       </div>
     </div>
+
+    <!-- Empty search -->
     <div class="button button-reset" role="button" aria-label="Search">
-      <button class="toggle-button icon icon-close" id="reset-search"></button>
+      <button class="toggle-button icon icon-close"
+        id="reset-search"></button>
     </div>
   </div>
-</nav>
+</nav>
\ No newline at end of file
diff --git a/it4i_theme/nav.html b/it4i_theme/nav.html
index c926c085b448aa6b7897dfad56de7d1b23b7512a..1d70b9fc11a87ccb850a96b017556f45a61ab26c 100644
--- a/it4i_theme/nav.html
+++ b/it4i_theme/nav.html
@@ -1,24 +1,43 @@
+<!-- Render sections -->
 {% if nav_item.children %}
   <li>
     <span class="section">{{ nav_item.title }}</span>
     <ul>
+
+      <!-- Render pages of section -->
       {% for nav_item in nav_item.children %}
         {% include "nav.html" %}
       {% endfor %}
     </ul>
   </li>
+
+<!-- Render page link -->
 {% else %}
   <li>
-    <a class="{% if nav_item.active %}current{% endif %}" title="{{ nav_item.title }}" href="{{ nav_item.url }}">
+    <a class="{% if nav_item.active %}current{% endif %}"
+      title="{{ nav_item.title }}" href="{{ nav_item.url }}" >
       {{ nav_item.title }}
     </a>
+
+    <!-- Expand active pages -->
     {% if nav_item == current_page %}
+
+      <!--
+        The top-level anchor must be skipped if the article contains a h1
+        headline, since it would be redundant to the link to the current page
+        that is located just above the anchor. Therefore we directly continue
+        with the children of the anchor.
+      -->
       {% if h1 %}
         {% set toc = (toc | first).children %}
       {% endif %}
+
+      <!-- Render anchors of active page -->
       {% if toc and (toc | first) %}
         <ul>
           {% for toc_item in toc %}
+
+            <!-- Render anchor -->
             <li class="anchor">
               <a title="{{ toc_item.title }}" href="{{ toc_item.url }}">
                 {{ toc_item.title }}