now answering invites let them disappear if they were declined. Also now invites are displayed sorted by date, and friends sorted by nick names
Merge pull request #53 from dvicini/master

now answering invites let them disappear if they were declined. Also now...
Merge branch 'master' of https://github.com/countschokula/ese2013-team6 into countschokula-master

Conflicts:
	src/MensaUniBe/src/com/ese2013/mub/AnswerFriendRequestListener.java
	src/MensaUniBe/src/com/ese2013/mub/AnswerInviteListener.java
push callback activity
Merge branch 'master' of https://github.com/dvicini/ese2013-team6
Merge pull request #55 from dvicini/master

callback activity for push
InvitionBaseFragment now starts with Invited instead of invites