add BME680 and LittleFS, use ESP8266, rename to AirQMon

assets/1416589372_dashboard_medium_512.png

data/browserconfig.xml

data/favicon.ico

data/img/android-chrome-192x192.png

data/img/android-chrome-512x512.png

data/img/apple-touch-icon.png

data/img/favicon-16x16.png

data/img/favicon-32x32.png

data/img/mstile-150x150.png

data/index.html

data/site.webmanifest

platformio.ini

src/main.cpp