Workflow works, fetches same artist n times
async.series refactoring, artist closure fix
Working top artist for user
removed logging
merge with master
no env variable crashing issue fix
Merge branch 'lastfm-event-top-artists' of github.com:los-nudos/festapp-server into los-nudos-lastfm-event-top-artists

Conflicts:
	package.json
	server.js
Move lastfm to routes
Check that JSON contains the expected properties
Prefix cache keys
indent
lint
delete unused data files