[2.22](GS, RP) Initial commit for ThreadActivity
[2.22](GS, RP) Layout done
[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