Add markdown cheatsheet

README.md

@@ -29,9 +29,14 @@ For other GUIs check out https://git-scm.com/downloads/guis/
 Our remote git server is located at https://git.web.rug.nl/ <br/>
 You can log in with your usual p-number and password.
 
+Cheatsheets:
+[Markdown](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet)
+
+
 ## Learning objectives
 - Introduction to VCS
 - Create new repository
+- README.md
 - Git ignore file
 - Staging
 - Committing