msysgit.github.com Site Redesign

As discussed in https://github.com/msysgit/msysgit/pull/99 I have redesigned the Git for Windows project site and am submitting my idea for the new site here.  I expect that the textual content of the site will need revision as I have made some assumptions when writing it.  As for the site design, I welcome any requested modifications and / or commits by others.

Feel free to edit!

As I could not get http://htmlpreview.github.io to display SVG images or custom fonts, I have left the latest version of the redesign hosted here for review:
http://dl.dropboxusercontent.com/u/40538551/gwhtml/index.html