This makes it easier to move around for future optimizations, and it already gains us a few FPS by allowing the compiler to optimize a little better

This actually works fine, we just weren't initializing it to zero, which borked a bunch of assumptions of course.

It's causing USB problems (reading the string descriptors) and it doesn't help now that I've determined that executing from RAM doesn't significantly speed up the updatePixel loop.

This gives one combined image that is convenient to load either with the test jig or with the Teensy Loader

This fixes some bug that I don't have time to investigate right now. Annoying! I suspect an assumption in usb_mem that I'm forgetting about.

For the vendor code to make it through string conversions unharmed, we should make it part of the printable ASCII subset. Fixes compatibility with xusb when reading WCID descriptor.

This is some Microsoft-specific gunk which allows us to work with usermode apps without any onerous driver installation. Much better user experience!

Otherwise, some call sites will certainly forget this...