Skeleton code for the e-paper interface.
Pull in flash library and make it talk Wixel SPI.
C99
Flash chip works.
Remote control, with Flash info service.
Figured out that MOSI remaining high somehow drives the pwore LED on the board high...

leave a placeholder for later shutdown sequence.
Revert "C99"

This reverts commit dd16214d421a1cb5f5ecaa80f528c4a65b93dd15.
Factor out flash component.
Remove unneeded stuff.
Flash read.
Flash read arbitrary addresses.
Silence warning.
PWM configuration.
Drive PWM pin low when unused.
e-paper interface compiles.
Wait first.
Add EPD header file and clear routine.
EPD clear command, and take commands from either comm.
Read an image from Flash.
Complete flash-to-e-paper interface.