added initial support for categories and alarms as extended properties
- fixed wrong SQL statements
- improved property handling
Merge branch 'transactions' of ssh://gitosis@git.dmfs.org:23023/android-tasks/task-provider.git into categories
- added task & instance notification on property modification
- added indices for properties and categories
- improved cursor handling
- updated javadoc
- updated JavaDoc
fixed db schema migration
- added inital support for alarms
- added support for multiple alarm notifications at the same time
- added alarm setting
made alarm setting app specific
- fixed trigger
- small improvements
added alarm count trigger
Merge remote-tracking branch 'origin/categories' into new-release

Conflicts:
	src/org/dmfs/provider/tasks/TaskProvider.java
add migration for new columns
-fixed database migration version 5
- added default property handler
- removed alarms for completed and canceled instances
- changed AlarmNotificationHandler to check for "is_closed" instead of
"status" for upcoming instances
fix migration
 - added support for start alarms