Work around import issues in Django 1.11 when djpyfs is imported early.

Try to fix travis deploys to PyPI

* General code cleanup
* Bumping version, small update to README
* Adding automatic PyPI deployment

* Made Py3 compatible

* Added unit tests using pytest

* Travis CI, versioneye, codecov, and tox integrations.  

* Pointed to new `edx/pyfilesystem` dependency (needed to support Py3)

* Updated license to Apache 2.0

Updating fork to pmitros/django-pyfs master

Minor cleanups for Django 1.8

fix RemovedInDjango19Warning warning

Removed stub files that had no real content in them.

Removed the check against the Django version.  Kept the index needed for
the query.

Adds support for auth. Note: UNTESTED (but will be in a few minutes, so if you see this later, tested)