latest set of dependencies to scald
Merge pull request #657 from krishnanraman/develop

latest set of dependencies to scald
Make mocking cofigurable in Test
Add sumByKey
Merge pull request #663 from twitter/transformTest

Make mocking cofigurable in Test
Merge pull request #664 from twitter/sumByKey

Add sumByKey
mark version 0.9.0rc2, not published