Refactor public controller to find an existing campaign based on the params and then send the related audio file
Added method to find the right campaign based on params given and changed the file_for_stream_key method so it creates AudioEncoding subclasses to encode with the proper format based on the key given
Refactor AudioEncoding to have two subclasses where the encoding will happen. Resque task is now fired after_create
This gem enables REGEXP in sqlite3