Added serials prints, modified OM_Serial_Com_Client

--Added USBSerial.prints for motor 2 and 3 statuses.
--Changed "repeat shots" to "mirror up" in command document and changed
data input from 0-255 to boolean.
--Added "set start here" and "set stop here" serial commands (motor
commands 28 and 29) for debugging purposes. These can be removed before
final release.