Update README
fix historian shifting logic
Revert "fix historian shifting logic"

After using it with this "bug" fixed it was not so awesome.

This reverts commit 7d747d47f15e6cccf210007d909480ce6483cca9.
making the historian less aggressive
added refresh_users route to update the collaborator list and made route controls redirect to /
monkey patches Burgestrand's changes to get this to be more efficient so it hopefully plays smoothly on the raspberry pi.
removing spotify_tracefile since it never flushes data and grows too large
git ignore DS_Store and coverage directory
using autoload_for gem to handle autoloading app ruby files
rework to use multiple playlists rather than one collaborative
No longer use autoload_for gem to load files since it appears to break things
fixing issue with loading up empty playlists from non-existent cache.