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Changelog:
-> The API now prints what's happening to System.out in a very verbose manner.
-> A massive bug has been found and replaced. The liveSync() method when called after sync() would immediately start executing since there was no provision to wait for the sync() method to end before the liveSync() method is called. This functionality is now provided by the hold method which basically waits for the DBSynchronizer thread to finish its run before continuing further execution.
-> Minor code changes in the lastSyncTimestamp() function that could throw an exception inside the DBSynchronizer class. Some other minor changes elsewhere.

Author: arsakarme