Clear any previous passcode data when the app is installed.
Clearing passcode data at first run of app install
Merge pull request #803 from khawkins/clear_passcode_at_install

Clear passcode data at first run of app install
Merge pull request #804 from wmathurin/unstable

Block to get sync status updates / SFSyncState instead of NSDictionary
Merge pull request #805 from wmathurin/unstable

New classes: SFSyncOptions and SFSyncTarget (instead of NSDictionary)