Added code and color for 'note' and updated the hello world note.
Remove the mutexes and use chan instead in order to handle the wait lock
Add inconditionnal lock in Start/Stop/Kill to avoid races
Flush whether or not there we set the rawmode to avoid the client to lock
Flush stdout on import to avoid deadklock when waiting for stdin (import -). Fixed #365
Merge remote-tracking branch 'origin/fix_flush_behaviour'
Merge pull request #363 from dhrp/docs

Added code and color for 'note' and updated the examples note.