This refactors out a bunch of code to make better use of the
SYSINIT mechanism...

Completes the PKI side of things for doing mutual authentication...

Uses a python script to generate the USB descriptors, and basic
interface code for the STM USB HAL Layer..  This gets ride of a lot
of the glue code that was previously written, allowing the glue code
to be easily changed/update...

break out the memory debug function into it's own file...

Minor fixes to the rs485 framing code...  Finally found the bug where
aborting a receive would corrupt the RX state for some reason...

Add back RNG seeding, and make it generic...

This is better than using RAM, as it keeps the state between power
cycles...

symbols defined by the linker script are all treated as addresses, so
we need to get the address, and cast it to an integer for the length
case..

The return value must be used, but as we init early on, we don't need
to check it, so just hide the error w/ an inline function..