Add GitHub repo and homepage links to project cards (fixes #37)#46

Copilot wants to merge 3 commits intomainh5bp/h5bp.github.io:mainfrom

copilot/fix-245b13b2-d58a-4c7f-86a8-6fb07863545fh5bp/h5bp.github.io:copilot/fix-245b13b2-d58a-4c7f-86a8-6fb07863545fCopy head branch name to clipboard