1.0 release

-added CalEvent class to hold info on the active event
-activeEvent() returns a CalEvent object
-activeEvent() now correctly polls columns from the instances table instead of the Events table.  This should solve dtend returning null for recurring events
-min api level lowered to 15 (Ice Cream Sandwich)
-uses NotificationCompat.Builder to support API level 15
-license.html updated with info for the included icons
-about.html includes donate link
-PollService now correctly restores volumes when an event is finished or when the service is stopped
-notification displays the name and end time of the current event