Some View Updates

1. The Home button in the top left corner brings the user back to the
last activity.
2. Added a refresh button to the user list.
Merge branch 'master' of https://github.com/Seeem/MeetMe

Conflicts:
	MeetMe/bin/MeetMe.apk
	MeetMe/bin/classes.dex
	MeetMe/bin/classes/de/hfu/meetme/views/UserListFragment.class
	MeetMe/src/de/hfu/meetme/views/UserListFragment.java