Changed datetime method in models.py, added api.py (WIP)

Docs and two functions for API

Added Nose. Added test_api and some test cases.

Updated tests, wrote get_video_url, added travis

Updated tests, wrote get_video_url, added travis

travis file renamed

added requirements for travis

added requirements for travis in travis

added requirements for django-nose for travis

added requirements for djangorestframework for travis

modified models. added fixtures. modified tests

added test for date modified

changed timezone, renamed and moved edx_video_id