Update js assets for production

require.js modules do not work well with the asset pipeline in production.
Asset pipeline wants to compress everything and will only look for compressed
assets.  require.js asynchronously loads assets - can't load assests if they're
compressed.  Static/uncompressed assests can only be accessed from public
directory.  Therefore, move Backbone playlist application to public directory.

Update production config to serve static assets

Remove GGS.js from application.js as it is only needed in development