Move to Jekyll

As I really like the Interoperability Framework, I’d like to propose to move the site to *[Jekyll](http://jekyllrb.com/)*. Many big projects like *Bootstrap* or *Jekyll* itself use this static generator for documentation.

Github has Jekyll built-in it in Pages, so you don’t have to worry about it. When you merge this PR, the site builds.

If you like my proposal, I can migrate the rest of pages.