Add lyrics view

[erodozer]

If a song has lyrics in its ID3 tags, allow fetching them from the [songpath]/lyrics route.

Lyrics should be visible in a scroll box where the visualizer is on the desktop as a toggle. One should also be able to pop out lyrics into a small popup window.

window.open('{{path}}/lyrics','targetWindow','toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=250,height=500')

To keep styling consistent between the site and the popup, it might be valuable to make lyrics an actual template view with styling, and have the lyrics panel on the site that displays for the active song be an iframe.

[erodozer]

If the lyrics window is open, when the active song changes it should update the popup window's location

http://stackoverflow.com/a/14345456/1968689