* add mqtt discovery (compatibile with home assistant) with omg status binary sensor & bme280 sensor
* added mqtt discovery to Test_config.h for ESP32 (ESP8266 & other boards was not tested)
* include support for ESP8266 & arduino mega
* fix getting MAC for esp8266
* esp8266 fix
* make mqtt discovery functions functions more generic, readable and easy to use & extend
* make mqtt discovery functions functions more generic, readable and easy to use & extend PART 2
* remove the macro for each attribute and supposing that if there is a bme280 we expose all
Florian
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