A new commit of bignum-embedded

The bignum-embedded project is crawling out of the proof-of-concept stage.
It's based on the bn functions from OpenSSL which implement arbitrary-
precision arithmetic. I've teased these loose from OpenSSL, and they've now
run in an stm32f4-discovery board and produced correct results. Code has
yet to be cleaned up; there are probably still hidden and undocumented
dependencies on my particular toolchain.

Hosted at github: <https://github.com/melwilson/bignum-embedded>

Mel.
.