Begun implementing live preview.

Added the server functionality to codify via tornado and tied that into
the cli app.
Added rendering of pages.

Implemented the rendering of pages, using the template built into codify.
Tidying up implementation.

Added the codehilite.css file instead of generating it each time the
documentation is built, this allows code highlighting to appear when
running codify in server mode. Tidied up the implementationf of the what
happens when there the file is not found, now it returns a proper 404 and
a message stating that the server could not find the source file.
Updated the build functionality.

Removed the generation of the codehilite.css file as this is now included
in the static assets packaged with codify.
Refactored the packaging functionality.

Refactored the build.package function to make it more self contained so
you no longer have to create the temporary directory or build the project
before trying to package it.
Updated README.md

Updated the requirements and acknowledgements.