made challenge screen #12
Connect Screen is working
Connect screen
Merge branch 'viewchallenges'-Master

Conflicts:
	MindMaster/src/main/java/no/group3/mindmaster/MainActivity.java
	MindMaster/src/main/java/no/group3/mindmaster/Views/HowTo.java
	MindMaster/src/main/java/no/group3/mindmaster/Views/NewGame.java
Merge branch 'master' of https://github.com/rtc11/mindmaster