message: Add limit information to StepCount attribute
diff: @@ -310,14 +310,14 @@ the attributes will not be included.
  For instance, the FeatureCount attribute of a VibrateCmd message
  will refer to the number of vibration motors that can be controlled
  on a device advertising the VibrateCmd message.
  -* _StepCount_ (array of unsigned int): For each feature, lists the
  - number of discrete steps the feature can use. Returning to the
  - VibrateCmd example from the above _FeatureCount_ specification, if a
  - device had 2 motors, and each motor has 20 steps of vibration speeds
  - from 0%-100% (this is exactly what the Lovense Edge is), the
  - _StepCount_ attribute would be [20, 20]. Having the array allows use
  - to specify different amounts of steps for multiple vibrators on the
  - device.
  +* _StepCount_ (array of unsigned int, minimum value: 1): For each
  + feature, lists the number of discrete steps the feature can use.
  + Returning to the VibrateCmd example from the above _FeatureCount_
  + specification, if a device had 2 motors, and each motor has 20 steps
  + of vibration speeds from 0%-100% (this is exactly what the Lovense
  + Edge is), the _StepCount_ attribute would be [20, 20]. Having the
  + array allows use to specify different amounts of steps for multiple
  + vibrators on the device.
  ---
  ## DeviceRemoved
  