v2.1.1 ESP8266 Arduino framework fix

v3 of ESP8266 Arduino framework introduced breaking changes, so I edited platformio.ini to only use version 2
This has nothing to do with the NodeMCU hardware versions.

v2.1.0 Arduino->Platformio

Development (#70)

* deleted v1.28

* deleted files

* added 4 wire version folder

* structured folders

* more structure

* warnings

* structured

* deleted bwc2.0.0

* edit text

* edit readme

* edited readme

* deleted timezone call

* Added Arduino IDE text

* edit

* edit readme

* Update README.md