gotadmin init -> git init --bare ; got patch -> git apply

Please the HTML validator, and perform some other minor markup tweaks.

git reset --hard is a closer equivalent to got revert than git checkout

fix page title

fix command markup error i made in comparison.html

fix tr tags in tables; spotted by bentley@

add a comparison page, comparing Got to CVS, SVN, and Git I have seen this being requested multiple times now. Hopefully this page will satisfy people who do not have the time to figure out the high-level differences by studying the manual pages.