message: Update README.md
  I find it more user friendly if the user does not need to go into the code to find values for enums. For the error code it is written but not for the others.
diff: @@ -206,6 +206,9 @@ You must set for every motor:
  #### Motor Modes
  If you're using a regular hobby brushless motor like [this](https://hobbyking.com/en_us/turnigy-aerodrive-sk3-5065-236kv-brushless-outrunner-motor.html) one, you should set `motor_mode` to `MOTOR_TYPE_HIGH_CURRENT`. For low-current gimbal motors like [this](https://hobbyking.com/en_us/turnigy-hd-5208-brushless-gimbal-motor-bldc.html) one, you should choose `MOTOR_TYPE_GIMBAL`. Do not use `MOTOR_TYPE_GIMBAL` on a motor that is not a gimbal motor, as it may overheat the motor or the ODrive.
  +Motor Mode values are:
  +* `MOTOR_TYPE_HIGH_CURRENT = 0`
  +* `MOTOR_TYPE_GIMBAL = 2`
  **Further detail:**
  If 100's of mA of current noise is "small" for you, you can choose `MOTOR_TYPE_HIGH_CURRENT`.
  @@ -237,10 +240,10 @@ An upcoming feature will enable automatic tuning. Until then, here is a rough tu
  By default both motors are enabled, and the default control mode is position control.
  If you want a different mode, you can change `my_odrive.motorN.config.control_mode`.
  Possible values are:
  -* `CTRL_MODE_POSITION_CONTROL`
  -* `CTRL_MODE_VELOCITY_CONTROL`
  -* `CTRL_MODE_CURRENT_CONTROL`
  -* `CTRL_MODE_VOLTAGE_CONTROL` - this one is not normally used.
  +* `CTRL_MODE_POSITION_CONTROL = 3`
  +* `CTRL_MODE_VELOCITY_CONTROL = 2`
  +* `CTRL_MODE_CURRENT_CONTROL = 1`
  +* `CTRL_MODE_VOLTAGE_CONTROL = 0` - this one is not normally used.
  To disable a motor at startup, set `my_odrive.axisN.config.enable_control` and `my_odrive.axisN.config.do_calibration` to `False`.
  