[2.22](GS, RP) Initial commit for ThreadActivity
[2.22](GS, RP) Layout done
[2.16] User Object Testcases (RU, TP)
[2.16][Refactor] User Class Testcases refactored (RU, TP)
[2.16] delete old Testcase (RU, TP)
[2.16] add User Class (RU, TP)
[2.16] User Class json zugriff korrigiert (RU, TP)
[2.16][Refactor] passing User object from Login and Register instead of uid (RU, TP)
[2.16.1][Refactor] User to Singelton, no putExtra() in Login and Register, Testcases refactored
blabla
[2.16.1]Merge branch 'master' into User(RU, TP)
[2.22](GS, RP) Task Threads anzeigen+Tests done
[1.20][Refactor](PG) xml file refactored
Merge branch 'master' into ThreadsActivity
[2.16.2] Onclicklistener for login button in MainActivity (RU, TP)
[1.20][Refactor] background color to white (RU, *.*)
[2.16](RU, GS)Merge branch 'master' into User

Conflicts:
	forum-app/src/com/example/forum_app/MainActivity.java
[2.22][Refactor](RU, GS) layout refactoring + ForumView Login and Register Button refactoring
[2.21] merge master into branch ShowPosts (PG*, TK*)