Fixed an html parsing error.

Basically, removed leftover cruft from microdata.... I think.
Commented out some offending code

Also added some alt-text
Removed stray image tag from footer
Conformed to html5 spec

Changed address back to section
Removed port from IRC URI
Added a note about tags with spaces
added some files to exclude from site builds
Added git reset css for later use
Added an additional link to some more info.
Started working on JS to display pingbacks
Working prototype
Added webmention js