Obliterated references to Oberlin and Oberlin URLs from docs.

Added an acknowledgment to the Office of Communication in the
AUTHORS file.
Updated copyright notice in the docs.
Updated requirements in docs and tests.
Corrected test failures.
Bumped version numbers for 2.0.0 release.
Updated code for django 1.7+.
Bumped version numbers for 2.1.0.
Added migration path for 2.1.0 to the docs.
Merge branch 'master' into fix/exif-orientation