Relative urls makes life easier

Just a quick tidy-up here - since you'll want to be able to work on this without having to push things live, I changed all the links to relative URLs. For example: "http://lukejmeier.github.io/index.html" => "./index.html"

That way, if you load the file up on your desktop, heading to ./aboutme.html will load your local file, rather than show you what's on GitHub. This also means you'll avoid having to change all the URLs once you're using your purchased domain.

I also enforced a min-height on your .container, that way with short pages, you don't end up with ugly space at the bottom.
![screenshot 2014-06-05 10 37 30](https://cloud.githubusercontent.com/assets/10201/3188926/2ada9e02-ecbf-11e3-9593-5ea0e85ea465.png)