1.4.2

Updated to v1.4.2

Overall patch to improve Offline Persistence Toolkit's performance.
(1) OfflineCaches keeps keys in memeory for quick lookup.
(2) Optimize queryHandler to avoid constructing full response object
(3) Avoid creating store metadata for internal stores
(4) Remove unnecessary aynchronization code.

New features:
[ADDED] Added 'IN' Query handler support

Bug Fixes:
[FIXED] PersistenceManager.js fixed minor function call issues
[FIXED] calling persistencestoremanager.deletestore() for stores returned by getstoresmetadata() does not delete
[FIXED] ConfigurablePouchDBStoreFactory when merging factory
option with store option.