manage collection to be able to use event to emit and receive socket message
add collection to use event to manage socket.io message
Add socket events
Add socket events
add receive and emit new topic to clients
updated or added items are updated in all clients connected with the same user
add deleteTopic socket event
add realtime delete function
fix bug when receiveD deleteTopic message
fix bug when receiveD deleteTopic message
fix bug when receiveD deleteTopic message
Merge remote-tracking branch 'origin/master'

Conflicts:
	boards.html
	js/item.js