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.

Just saw Paul's note about USB DMA from Flash being sketchy. In the boot loader it doesn't matter since we exec from RAM anyway, but we might as well un-const the WCID descriptor for consistency.

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

Originally I wasn't planning on doing this, but since I need to reclaim some RAM anyway, might as well just start hacking out everything we don't need...

Make room for Open Pixel Control tools