Deleted former MainActivity (now use GroupMainActiviy)
Merged with deletion of MainActivity
Changed the behaviour of the suggestion button in GroupsActivity:
Will now allow the user to activate its GPS in case we did not get a location.
Or allow to reDisplay the suggestion pop-up if a suggestion for a group near the user was previously issued.
Or display that not other users have been found around the user.
Fixed behaviour of history when groups no longer exist
centralized the behaviour for suggestion button in a single method for readability and maintanability
Added reset group password functionality
A user will no longer be offered to recreate a group if it was automatic.
various logs added
Merge branch 'groupSuggestion' of https://github.com/lca4/unison-android into groupSuggestion
renamed dialog
new file was not automatically added in commit
Merge branch 'groupSuggestion'
fix null pointer exception introduced while trying to avoid null pointers!
In LibraryService.java
Merge branch 'master' of https://github.com/lca4/unison-android
FIX onKeyDown() hierarchy

Clicking on physical return button goes back to previous activity, finishing
the leaved activity.