Feature: Music Profiles

Small feature to allow last.fm-style URLs of the form e.g.:

http://localhost:8080/music/Neutral+Milk+Hotel/
http://localhost:8080/music/Avril+Lavigne/Let+Go/

for the band Neutral Milk Hotel and Avril Lavigne's album Let Go, respectively. In the event that the artist is not immediately found, we redirect to a (currently non-functional) search page.

This is pretty basic and the artist/master comparison could definitely be improved, but at least it's a starting point for future iteration. It's also useful for the upload flow I'm working on.