x04

Minor updates to the variants.h file:

• fixed incorrect analog pin definitions
• include additional hardware UART pin defines

x03

Updates board.txt file to use TinyUSB, which AdaFruit switched over to in 11.0 release.

@oclyke solved compiler issue: Adafruit switch to using TinyUSB in the core. The following changes update the board definition to use TinyUSB

(Skipped to x03: In x02 (deleted), @santaimpersonator forgot to remove USB header in variant file... my bad.)

x01

Adding x01 panel