votes_changed web socket event
disable karma crap and enable grunt watch
renaming function name
websocket votes_changed usage in frontend
init load of voted by get request
pushing votes_changed event when song is played
client side removing and adding user votes
remove user vote client side in voting service
remove refresh button on voting view
fixes ttl index error on collection sessions
of notification server
Revert "disable karma crap and enable grunt watch"

This reverts commit a2e0089b84f8d4dcb475b4c93e602178bc0e8e2f.
Merge pull request #57 from songster-project/feature/vote_websocket

Feature/vote websocket