Prevent automatic launch for camera and micro.
Launch mic and/or cam from the On/Off buttons.
On/Off for the camera ok, just need to clean the li in the peers.
On/Off for video working great !

       debug remains.
On/Off for audio seems to work. Hard to test on one computer !
Remove debugs.
Refactor On/Off logic + change camera button logic.
Modify where the elements in the room are modified.
Split code into methods.
On/off buttons are now... buttons !
[database] implement find in mongodb
Disable buttons on/Off while waiting user's answer.
implement ping pong between clients and ws server
Change On/Off status only when needed.
Merge pull request #73 from iMajestic/onOffButton

On off button
Thank you Shedna !
Merge pull request #72 from Paulloz/pingpong

Implement ping pong between clients and ws server
cleanly close all connection when leaving a room page