Merge pull request HelTecAutomation#220 from SebDominguez/master

Update Arduino.h

updated asr6601 boardInitMcu()

update AT to Rev1.3

update AT to Rev1.3

updated /platform.txt

update boards' name

fixed example lorawan_interrupt

renamed inside TinyGPS++ to avoid conflicts

Optimized code structure, naming in Arduino style.

Fix MPU9250 Mag Offset bugs