Deleted YunFirmata.ino

Didn't need it, using MotorshieldFirmata from pyfirmata-AFMS anyway
Removed roles and JSON

Reverted to a more simple method, with cleaner code and communications.
Bugfixes and some code cleaning

Also removed unneeded files.
Now works pretty well.
Update pyFirmata-AFMS submodule
Merge remote-tracking branch 'origin/dev'