First pass at getting youtube integration in. This adds the youtube_it gem, sets up the models needed, and finally adds the figaro gem for saving the api key/login/pw etc in ENV variables instead of checking them in!
Figaro.
Completed youtube support.

Youtube support is done via a rake task.  The rake task will search for videos titled similarly to "owning artist name - track name".  The search limits to embeddable videos (aka format: 5 in the youtube api).

This task needs to be run periodically or as videos are removed the pages may break.
Rearranged the song's show page.
Add special text for when there are no definitions