add spinner
print message when someone leaves a room
set isChannelReady to false when hanging up
always stop the spinner when hanging up
set channel to closed when the peer leave the room

when the peer leaves the room set the isChannelReady and isStarted to
false and give the isInitiatore status to the peer still in the room
Merge branch 'fix1' into spinner
slow down spinner
fix size and position of spinner
Merge branch 'spinner'