OR-586 remove angular-socker.io script inclusion, we don't use it anymore
OR-586 Fire websocket connection on application startup
OR-586 Upgrade easyrtc to the beta branch

This allows us to provide the socketio connection on the frontend
OR-586 Check websocket authentication

We flag the socketIO webgsocket with a userId property when user is correctly
authenticated. So no userId => no auth
Merge pull request #627 in OR/rse from ~MBAILLY/rse:OR-586-update-easyrtc-to-latest-version to master

* commit '0ef76abb9c502376c91f21f75d1215bbbd8b246c':
  OR-586 Check websocket authentication
  OR-586 Upgrade easyrtc to the beta branch
  OR-586 Fire websocket connection on application startup
  OR-586 remove angular-socker.io script inclusion, we don't use it anymore