Added push button debounce functionality

[FelixHauser]

I added a debounce functionality for the Rotary Encoder's push button so that no other library is needed. The debounce code is adapted from Thomas Frederick's Bounce library (see readme.md). I overloaded the original constructor to accommodate for pin number of the push button as well as the time (in ms) for the debouncing. The original constructor works as per usual, so users updating the library won't have to modify their codes. An example of the use is also added.

Regards, FH

[mathertel]

Hi Felix, I think this is not the way to extend a single-purpose library but you should combine the libraries you need. In my appliances I have often multiple buttons but only one rotary encoder. I suggest you use the OneButton library for all button inputs and the RotaryEncoder library for the turning events. (By combining both libraries the code size will increase in scenarios with multiple buttons)

[FelixHauser]

hi there. Still it can be useful for small project which only need a encoder a single input. For larger projects, I certainly agree. But for small ones I find it practical. Also for larger ones you don't even have to use the debounce functionality or even declare it.

[mathertel]

closed after discussion and clarification. It is not intended to combine multiple features into one library when it can be kept separate. See https://github.com/mathertel/OneButton for a library for the button functionality of a rotary encoder that offers a "push" button.