Add display option for Noritake GU12864-800B display
fixed bootloader reserved lock bits values
Use Arduino core as default for all boards
SDA flash chip select is dubbed official and selected as default
RX flash chip select is dubbed original
fixed incompatibility with Arduino IDE 1.8.13
Update Arduboy2 library to 5.2.1
bootloader support for alternate flash chipselect SDA
reverted Sprites.cpp
added checkBatteryState checkBatteryStateLED functions to Arduboy2 library
update cathy3K bootloader with menu scrolling and progressbar