Bitly: Removed $(document).ready and shortened the click event.
Album: Simplified code for checking tracks.

album.handlebars used to have two "if" statements:
{{#if tracks}}
  {{#if tracks.track}}
     ...
  {{/if}}
{{/if}}

Now all we have to do is:
{{#checkTracks tracks}}
   ...
{{/checkTracks}}

I think the latter one is easier to read.