Added calendar selector
-added android support libraries for future backporting to Icecream Sandwich

CalendarActivity.java:
-rudimentary dialog to show available calendars to sync

CalEvent.java:
-added calendar id property with getter

MainActivity.java:
-added dark background normally used on future events as default background of the listview (untested, might not show up)

Calendar.java:
-basic representation of an android calendar
-provides id, calendar name, account name, and color

DatabaseInterface.java:
-updated to pull calendar ids
-added getCalendarIdList() to return a list of all calendars on the system

Prefs.java:
-added method to set a comma separated list of calendar ids to sync, getter returns a pre-formatted list of longs