Long overdue renam of ProviderListActivity to MainActivity.
Added friends page.  Does nothing, yet.
Added Editfriends page.  Does nothing, yet.
Edit friends: added some infra.  Does not yet work.
Changed selectable friends from textviews to checkboxes.
They don't do anything, yet.
Added refresh button to edit friends.  Does nothing yet.
Removed unused m_handler.
Changed getBaseURL() and readStream() from private to public static.
Added GetInstallationService.
Added missing prefs editor ommit.
Improved package replaced log msg.
Added activity to show all prefs.  Mainly for debug.
Show list of installations in edit friends activity.
Update list of installations in edit friends
activity when they are reloaded.
Store ids of selected friends.
CHanged friends to installations, where appropriate.
Indicate this installation in the edit friends list.
Retrieve friend addresses.  They are not yet displayed.
Changed utcToLocal() from private to public static.
Show addresses of friends.
Added auto-refresh to friends activity.