gattis/milkshake — pull request #4 by belisarius222 (2013-06-06 17:27:00+00:00)
Title: Fix error thrown when a song isn't streamable.

If a song in the playlist has `streamable: false`, then it won't have a `stream_url`, so an error will occur.

Thank you so much for writing this, by the way! I use it to power http://dubstepfrog.com (https://github.com/belisarius222/dubstepfrog)