Add credit where it is due (in the README and site)

[paul-hammant]

"Thanks for the foundational work in Corrode by Jamey Sharp and in Corrode and lengthy advice as to how to architect this from-scratch alternative to that tool"

Ref: https://jamey.thesharps.us/2018/06/30/c2rust-vs-corrode/

[thedataking]

fixed