added six
removed MAJOR/MINOR (blank) references in python2 Makefile and removed duplicate binary hashes
Merge pull request #2 in APS/python-roll from feature/APS-62-add-six to master

* commit 'ace90ba0212392df910d771851aaae5ca8da2b0c':
  removed MAJOR/MINOR (blank) references in python2 Makefile and removed duplicate binary hashes
  added six