Consider firstDayOfWeek of the current locale

Change-Id: Icbf714b3b4e4a7e93c93b622cb30105857fcb0b4
Open the calendar app when a day cell is clicked

Change-Id: I38d8b214c351541fe695e5a884b00a7cfe4afce5
Draw a subtle circle around the pressed day

Change-Id: I9c27ad9db8c65a160228acd3f327bfa943f0d335
Fix circle radius so that is constant for every widget size

Change-Id: I235b393c23b763c9f4eea2c80c04b3026b26a7ce
Highlight cell header for day of week

PS2:
- Fix build
- Make it less obtrusive

Change-Id: I779c9bd93da830900290a75985bb06cfdcca70fa
Merge remote-tracking branch 'omnirom/android-4.4' into kitkat