* changed the version to 201 in the header
* added conditional compilation for ESP8266 to add ICACHE_RAM_ATTR to ExternalInterruptHandler
changed storage for Micros to unsigned long
* some tuning to bit recognition and nested IRQ (STM32)
* outputaddressing corrected
declared notifyDccAccState for backward compatibility
* version define in NmraDcc.h
* DB_PRINT introduced
Changed debug printing to a macro.
Added cv29 to CV-addresses that reset caching of myAddress
* Corrections regarding Outputaddressing
OutputAddress must be a signed variable
* Changes/additions regarding output addressing and CVChange callback
Change Flag FLAGS_OUTPUT_ADDRESS_MODE accordingly, when CV29 Bit 6 (output addressing) is changed.
New callback 'notifyDccCVChange' which is NOT called if the CV is changed by means of the setCV() method
* Shorten Debug Messages
Because of Buffer overrun in the serial output. This leads to blocking
Serial.write() calls
* notifyDccSigState restored
Restore the old callback notifyDccSigState for compatibiltity to version
1.4.2
* switch off debug printing
* ESP32 specific changes
insert ESP32 specific changes reagarding the ISR by Hans Tanner
Franz-PeterandAlex Shepherd