* Added CSS based on Docco (blatantly copied).
* Updated sample text to better fit the emerging usage patterns. Some of the
things I did to make it render nicely for the Literate output may cause
problems when we go to render API output. I will cross that bridge when I come
to it.
* Added parsing infrastructure to the Generator behaviour to allow a
pre-processing pass over the document. Current the LiterateMarkdownGenerator
is using this to compile a map of `@org` references.
* Tweaked the HTML output slightly.
* Added a layer over the PegDownProcessor in LiterateMarkdownGenerator to
capture and transform `jlp://` links into relative links.
