Optimized images

Based on Google PageSpeed insights suggestion.
Removed unused render-blocking CSS

Arvo typeface doesn't appear to be used, so I'm eliminating it which
also cuts one unneeded http request.
Removed duplicate meta element
Minor CSS cleanup on homepage.

Removed unit type on values of 0. Removed duplicate style. Converted CSS
color name to shorthand hex.
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages
Merge pull request #6 from 06b/gh-pages

Minor homepage cleanup