Merge branch 'external_links' into 'master'

External links

See merge request !38

docs.it4i/src/css.css

+a:not([href*="//"]) {
+    /* CSS for internal links */
+}
+
+a[href*="//"] {
+    /*CSS for external links */
+    background: transparent url("/img/external.png") no-repeat right 0px top 1px;
+    background-size: 12px;
+    padding: 1px 16px 1px 0px;
+}

mkdocs.yml

@@ -2,6 +2,9 @@ site_name: IT4Innovations Documentation
 theme_dir: 'material'
 docs_dir: docs.it4i
 
+extra_css: 
+   - src/css.css
+
 # Repository
 repo_name: it4i-admins/docs.it4i
 repo_url: https://gitlab.it4i.cz/it4i-admins/docs.it4i