Bump to version 5.5.2 

Bump to version 6.1.1 

Bump version to 6.1.0 

Bump travis to test 6.0.0 GA 

Version bump to 5.5.1 

Version bump to 5.5.0 

skip test_elasticsearch2 in MANIFEST 

Version bump for release 

version bump for 5.3 

bump version to 2.0