move track colors and backgrounds into product flavors
Change project to use AppCompat v7

Change minSDK version to 14 (needs PreferenceFragment)
Remove v11 styles
Replace all references to ActionBarSherlock
Replace PreferenceActivity

Instead use a PreferenceFragment since AppCompat does not contain
a PreferenceActivity.
Add a general PreferenceCategory to get consistent layout
Reformating, add scrollBarStyle 'outsideInset'
xml reformating
ActionBarListActivity: Add missing support for empty view in ListView
show changes dialog in onResume, not (only) onCreate
Fix for NPE on empty lecture list
Move reloading of the alarms after deletion to the AlarmList

This fixes the alarm markers not being refreshed in the schedule
view after exiting the AlarmList via up navigation in which case
the MainActivity is restarted and onActivityResult not being called.
Make automatic updates the default behaviour
add NoActionBar style
Update notice on used libraries (ActionBarSherlock -> AppCompat)
Change ChangesDialog to use standard dialog, highlight the
schedule version
Remove obsolete notification icons
Use Toolbar for preferences to align content with Toolbar title
adjust colors for about dialog
change position of changes list action in menu
Use Toolbar and ProgressBar on MainActivity
Build accentColor ids for event boxes