Layout and SEO updates

Hey there,

Rakiru had asked me to look over the site when I had a chance.  The newer style is much better than the old placeholder crap, but the new layout wasn't very user friendly.  So, I moved some things around to more prominently display the things that I, as a user, want to see; that being 1) what this thing is, 2) why I should use it, and 3) where I can get it.  I moved the sections on why and who down because, unless I'm planning to contribute, I don't care why you made it or who you are.

The above fold page is a little condensed now.  So, if you feel it's too cramped, we can move some stuff around to make it feel nicer.

I also made some changes to the base layout to allow for more granular SEO control on a per page basis.  I'm not sure if you plan to have more than one site page, but this will help with SEO, if you do.  As you'll see in the diff, I also changed a number of HTML comments to be template comments so they don't show up in the final markup.