Fix connection error with the Move HUB

[josuemontano]

The move hub cannot be connected since there is a new port (70) which is suspected to be a debug port.

This addresses #17.

[josuemontano]

I wonder if a better solution is to remove the assert at https://github.com/virantha/bricknil/blob/master/bricknil/messages.py#L333. @virantha what do you think?

[maxbobkov]

@josuemontano Hi! I removed the assert at row 333, but now have an error: *** Terminating app due to uncaught exception 'OC_PythonException', reason: '<class 'KeyError'>: 66'

Any ideas what to remove this time?))

I try to connect BoostHub