fixes #68 Prevent selection except for chat text
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.
Merge pull request #69 from iMajestic/preventSelection

fixes #68 Prevent selection except for chat text
On/Off for video working great !

       debug remains.
On/Off for audio seems to work. Hard to test on one computer !
Remove debugs.
add share facebook and share twitter
some css fixes
fixes #67 Hide unlinked buttons
Refactor On/Off logic + change camera button logic.
fixes #66 : Resizing window breaks zoomed camera ratio
remove unlinked buttons from tutorial mode
Modify where the elements in the room are modified.
Split code into methods.
On/off buttons are now... buttons !
[database] implement find in mongodb
really center zoomed cam (not with a fake -66% margin-left)
center cameras on window resize