comment out useless model attributes for podcast
fix __str__ for podcast models
simplify podcast/revision models for easier api handling
setup django rest framework
basic functional api setup for podcasts/revisions
rename get_latest_rev()
saving a podcast creates a revision
remove hyperlinks in api to make it easier to use
update tests for podcasts
related name for podcast revisions
tweak api output so we can get just the info we need
give output for failed tests
give basic info about podcasts in list view