* GPIO refactoring
GPIO now using ESP-IDF API on all chips.
LEDC interrupt fix removed - no longer needed.
Edited pins_arduino.h in variants according to changes in gpio.
* Edited analog channels functions
* Add ttgo-lora32-v1 folder to variants folder
* Add ttgo-lora32-v1 info to boards.txt
* Add defs to pins_arduino.h for I2C OLED and SPI LoRa radio pinouts as per @stickbreaker