Messages menu's hebben toegang tot de menu button
Motivate Friend ipv Send Comment
First use gaat naar friends.
Update challenges after create
Finish in ChallengeViewActivity
Merge remote-tracking branch 'origin/master'

Conflicts:
	AlmendeMotivator/src/alm/motiv/AlmendeMotivator/ChallengeViewActivity.java
	AlmendeMotivator/src/alm/motiv/AlmendeMotivator/MessageCreateActivity.java
	AlmendeMotivator/src/alm/motiv/AlmendeMotivator/MessageViewActivity.java