Mute symbol work
Merge branch 'master' of https://github.com/rmcauley/rainwave
README readability
Fix timeline song height calculation
Fix wrong album art showing depending on ID

This avoids any unintentional album art collision when station IDs and
album IDs collide. (e.g. station ID 2 album ID 240 full size produces
2_240.jpg, while no-station 240px sized album art for album ID 2 is also
2_240.jpg)

First noticed by William Jackson!
Fix timeline song height again
Fix oversight when changing album art filenames
I would never leave debug code in a commit. Nope.

Not even once.