Last.fm scrobbler

A last.fm scrobbler. 
Uses the pylast library to easily scrobble to last.fm. Only works with whatify right now. The player (js) sends a POST to lastfm/scrobble with the data as json and the actual scrobbling occurs in a python file. 
Could also do `if all(LASTFM_API_KEY...):` to ensure all of them are set.