Support non-compliant Arduinos like ESP32 by conditional compile

[wuyuanyi135]

Hi.
Thanks for this great work! The concept and workflow in this library are very helpful and productive. I would like to use it in an ESP32 project, which is a non-complaint Arduino with missing analogWrite, Tone, etc. Therefore, the bundled machines will prevent this library from being compiled. I suggest to introduce individual compilation switches such as ATM_DISABLE_PLAYER to wrap each bundled component. This should make this framework more generally available for more devices.

Regards

[wuyuanyi135]

#73