First chunk of EpisodeField, episodeEstablisher widget + javascript.

Needs styling in the QuoteCreate form:
HTML for widget is in
	quotes_app/templates/widgets/episode_establisher_widget.html
Also see styles for example is in
	quotes_app/js_tests/episodeEstablisherWidget.html

Running issues:

The javascript widget probably needs to prevent typeahead requests
when a new podcast is being created.

Django is not populating the form correctly when it handles an invalid form.
Merge branch 'master' of github.com:podcastquotes/podcastquotes