Update gradle version as required for Android Studio 0.2.x
Update ActionBarSherlock and PullToRefresh project SDK levels to match Android Studio's settings after import.
Stop using the old Android Market URL
Make sure we always have the ID of a folder when fetching the unread/flagged count
Merge branch 'master' of git://github.com/k9mail/k-9

Conflicts:
	src/com/fsck/k9/activity/Accounts.java
Merge branch 'master' into MessageCounts