fix typo
remove unused module
removed unsed module
added performance tests
added new serializer - cPickleZipSerializer
fix CompressedJsonSerializer name
change version to v0.6.3
handle serializers in create command
optimze code
optimze code
update test case for performance check
fix docs for cli
copy() available via kvlite.copy()
copy() for big data
copy() for big data
fix issue with diff. serializers