message: TrebleBoost_wApp: adding more description in comment section
diff: * Created: Chip Audette, OpenAudio, August 2021
  * Purpose: Process audio by applying a high-pass filter followed by gain. Include App interaction.
  *
  +* As a tutorial on how to interact with the mobile phone App, you should first explote the previous
  +* example, which was "BasicGain_wApp".
  +*
  +* Here in "TrebleBoost_wApp", we started with the example sketch "01-Basic\BasicGain" and added
  +* the App functionality. It starts with the same features of "BasicGain_wApp" and adds new
  +* App-related features so that you can see a more complicated example.
  +*
  +* Like the previous example shows you:
  +* * How to use Tympan code here to define a graphical interface (GUI) in the App
  +* * How to transmit that GUI to the App
  +* * How to respond to the commands coming back from the App
  +*
  +* This example extends the previous example by:
  +* * Adding more buttons groups ("cards") to the previous example's GUI
  +* * Adding another page to the GUI
  +* * Adding a button that you can illuminate to indicate state
  +*
  * MIT License. use at your own risk.
  */
  