Add a sensor in pypot and call it form API REST

I have seen a lack of documentation regarding how to add a sensor in a configuration, recently a managed introduce the RAZOR IMU code in the sensor.py as inherited from the sensor class, is not super reliable but I works anyway.

Now I would like to how to get the introduce this sensor in a configuration, so that I’ll be able to use the API REST to get the angles. As for now when I use the command get_sensor_register_value it says that there is no ‘razor’ in robot.