* Bugfix for property entry 0 and PID_IO_LIST
* Remove unsused method
* Fix comment and add missing size adjustment in other method
* Callback properties must return valid data on startIndex 0. The return value must contain the actual element count within the property.
* Update .travis.yml
* Update platformio.ini
* Update .travis.yml
* Fix compilation
* Change platformio config
* Try to fix travis build
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* Add new pio config for CI
* save work
* save work
* save work
* save work
* Try to fix CI run for example knx-linux
* Fix compilation
* Try to fix ESP8266 compilation
* Do not enable cEMI server per default. Is only enabled during platformio build externally