Add README

.gitlab-ci.yml

+stages:
+  - test
+
+mdcheck:
+  stage: test
+  image: it4innovations/docker-mdcheck:latest
+  script:
+    - mdl *.md

README.md

+# pip-upgradedependencies
+
+Pip-upgradedependencies upgrades all outdated packages with respect to existing dependencies.
+
+Python 2.7 is required.
+
+## Usage
+
+```console
+pip-upgradedependencies
+```