Big UI update... added support for hiding the clock. Removed non-centered mode (sorry anyone whos still using that). Started using proper action bar and now faking dialog style

Conflicts:
	main/src/main/src/com/google/android/apps/dashclock/configuration/ConfigurationActivity.java

Change-Id: Ib760752f74f6186754c0aa104be0f04a3536eca0