Show "Update all" in the action bar of the main activity.
Update the notification code.

Now notifications are expandable with all new events, if supported.
Convert ConfigView to use PreferenceFragment.

Quite useless for a small app like this, but avoids the deprecation notices and I wanted to learn a bit about fragments. ;)
Minor optimization in MainWindow, fix some deprecation warnings.

Reuse the SimpleCursorAdapter in MainWindow instead of recreating it on refresh.
Also fixes an issue where parcels deleted from ParcelView wouldn't be removed from the list immediately.