SyncFinishedDialog will now show the full language string (not 'en' but'English').

Also removed the menu item for creating new exercises. This feature will be added in the next but one release.
Fixed NullPointerException in ExerciseTypeListFragment.

The OnPreferenceChangeListener has not been unregistered when activity stopped what could cause a NullPointerException.
Fixed some style issues for Android 2.x. Reduced logging.