Porting Proffie to other boards

So, I've been making that a little easier recently. I've tried porting ProffieOS to a few CPUs, but except for the Teensy processors, it's not really complete.

Basically, the thing to do is to create a config file and a board config file.
Then turn off as many features as possible (SD, AUDIO, WS2811, MOTION, etc.) and compile for the new board. Once that works, you can try out the serial monitor, but not much else. Then you turn on the feature defines, one by one and try to make them work.

sound and ws2811 can be particularly bothersome to port to a new cpu, because they need to be implemented using DMA, or some other thing that can run independently of the CPU.

ALso, in order for ProffieOS to work ok, it needs ~64k RAM and ~256k FLASH. It needs to run at at least 50Mhz, and an FPU is helpful. Also, fast SD card access (or some other storage) is very helpful.