Beginning support for widget, calendar broadcast intent support, prettifying the interface a bit

PollService:
-will now refresh when the calendar is updated (through PROVIDER_CHANGED broadcast intent from the calendar [reliability seems spotty])
-keeps track of its state within the SharedPreferences: "notActive", "eventActive", "quickSilent"
-recognizes when it has been woken after boot to clear the saved sate

QuickSilenceProvider:
-first attempt at a homescreen quick silence widget, still does not work correctly

Activity Settings and Activity Advanced Settings:
-cleaned up interface a bit