Set up jekyll templates and file structure

Preview at [http://nickbenes.github.io/crc_website/](http://nickbenes.github.io/crc_website/).

Kelly, if everything looks good go ahead and merge.  Also check out [http://nickbenes.github.io/crc_website/new_index.html](http://nickbenes.github.io/crc_website/new_index.html), and if that looks solid we can move completely to the templated version of the site.