fix mfr image to export using the correct formats
Merge pull request #82 from asmacdo/hotfix/image_exports

fix mfr image to export using the correct formats
inital error fixes
small changes for py3 support
Merge pull request #85 from asmacdo/dev

Cleanup from feature/refactor
test 33, 34, pypy
dont use invoke
python 3'4 doesnt exist. 3.4 does though.
Merge pull request #86 from asmacdo/feature/python3support

tests pass in py3 and pypy