Add link to github repo to rules.html

It's nice to be able to see how policies have been revised over time, so linking to the Github repo from the document seems to make sense.
Merge pull request #2 from genehack/add-github-link

Add link to github repo to rules.html
remove the php joke in the rules
tune the security response section
trying to get .well-known included
original take on the irc.perl.org governance
fix the sponsors block icon for perl.org
add the standard padding around the sponsors content
add tamarou as a sponsor
Merge remote-tracking branch 'upstream/master'
updates based on sungo and mst feedback in #magnet-srb