Changed class name
Changed class name

Class name was "Adafruit_BLE_FirmataClass", but all class references were to "BLE_FirmataClass".  Changed the class name to march all the other references to it.
adafruit/Adafruit_BLEFirmata,adafruit/Adafruit_BLEFirmata,adafruit/Adafruit_BLE_PinIO