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
move where export handler initialization from player to core to match renderer
move where export handler initialization from player to core to match renderer
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
type in imports
render returns a RenderResult
Merge pull request #87 from asmacdo/feature/fix_rst

Feature/fix rst
Merge branch 'dev' of https://github.com/asmacdo/modular-file-renderer into feature/ipynb
add travis to readme
Merge branch 'dev' of https://github.com/CenterForOpenScience/modular-file-renderer into feature/ipynb
wrote some simple tests for mfr_ipynb.detect