Adds South for database migrations.

Adds South to Third Party Apps in Django, which requires a pip install.
Adds Player app to project.

Adds a 'player' app to the project, where users will go to watch
videos. This app will include the branded player UI, as well as
the mechanism for interrupting playback for an interactive activity.
Adds 'watch' view to player app.

Adds watch view that makes a simple YouTube iframe embed. So,
visiting 'watch/youtube_id' will load a YouTube player for the
video with the specified youtube_id.
Adds player UI to player app.

Adds interface elements, styling and JavaScript coding for a
Fuqua-branded player wrapper for YouTube videos. This is a big commit,
because it includes a lot of JS and CSS code written prior to source
controlling this project.