Use the same favicon.ico as http://hexchat.github.io/
Move normalize.min.css in _includes and update it to v3.0.0.
Use more variables.
Remove unneeded end tag.
Use html5shiv, selectivizr.js and respond.js from OSSCDN.

This actually fixes page display with IE < 9.
CSS: minor tweaks.
Losslessly compress img/dependency-graph.png.

Before: 155889 bytes
After:  105188 bytes