Change from AGPL to Apache 2.0
Merge pull request #231 from edx/ned/liberal-license

Change from AGPL to Apache 2.0
Ugh, not this repo.

This reverts commit bfa090dbbe90664451df1a032e9864f17d27f7fd, reversing
changes made to a4c84afcc445624d05b076ff016d5448c07bc80c.
DateTime allows incoming value to already be a datetime
Merge pull request #233 from edx/dhm/datetime_native

DateTime allows incoming value to already be a datetime