dynamixel-genom3 2.1 released

Fix an issue with the dynamixel "byte stuffing" algorithm. In certain rare circumstances, wrongly escaped messages could be sent.
Fix the sending of commands when motors were not numbered sequentially.
Fix issues with the configure() service raising a bad_transition exception or not disconnecting a previously configured connection.
Reboot a motor after a successful call to configure().
Set a zero velocity target to all motors during a disconnect().
Add a stop() function, servoing all motos to a zero velocity target.
Document a bit the interface.

dynamixel-genom3