Merge branch 'feature/cli' into feature/plyvel
Update : implemented plyvel leveldb backend, does not actually passes tests
Update : Use plyvel bloom filter in read operations
Fix : bloom filters misusage
Add : cython requirement
Fix : implement fix for db connector del LOCK bug
MERGE
Fix : tests for plyvel and new MGET
Update : requirements and fabfile for plyvel
Update: Installation instructions for plyvel
Update: Setup handling core requirements install
Cherry-pick: Setup handling requirements install
Update: plyvel automatically installed at setup.py install
Update: Documentation to fit with plyvel
MERGE: plyvel into devel