Class website content is no longer hosted

[hintron]

Looks like the class website link, http://ece425web.groups.et.byu.net/, is dead as of 2023. I believe the class was discontinued after Dr. Archibald retired in 2020, and it looks like BYU finally stopped hosting the website sometime in the last year.

However, the material is ~all~ mostly still accessible via Wayback Machine: https://web.archive.org/web/20220126003933/http://ece425web.groups.et.byu.net/

Perhaps we could save off this content into a GitHub pages site in this repo, for posterity's sake.