fixing examples for UNO

Fixing the examples for UNO to use A2 and A3 as they support level change interrupts.

minor update

added ci using GitHub Actions.
minor bugs in examples fixed.

fixing interrupt routing registration

attachInterrupt was missing digitalPinToInterrupt in example.

2-step encoder support, improved examples

See CHANGELOG.md

Accelerated Rotator Implementation

Getting the time between rotation signal changes has been implemented.
This is the base for implementing an accelerated turning as you can see in the new example.
Turn faster for bigger steps.

Input pin initialization fixed for non AVR boards.

The initialization for the input pins now works also on other chips like ESP8266.

1.1.0

New example added