Public landing page using annotated source code

[follesoe]

Add a public landing page (github pages) for the project. We should probably use annotated source code to generate the page, similarly to what Jasmine does (and many other projects).

http://jashkenas.github.com/docco/ is the tool used to generate annotated source code pages. Docco uses Pygments for syntax highlighting, and pygments do support Io.