Start converting to Jekyll

The origin site was a plain old static site. We've decided to use Jekyll
to add a bit of dynamicity without going overboard. This commit brings
over the files from a `jekyll new` site, except for the index.html.
Trim up _config.yml

We don't need any of these default config settings.
Merge pull request #10 from opencompany/convert-to-jekyll

Convert to jekyll