Fixes #260 - Switch to using STI for OS families

Fixes #261 - parameters now use a single reference_id

This implementation uses STI but the table looks the same for all
variants. This is a little strange but it seems to work.

Also removed obsolete controllers and tests
Added more tests

fixes #273 - Provide a "Getting started" front-page

fixes #295 - This YAML generates a 500 error when trying to send over http

fixes #291 - clone host does not clone assoicated classes

Fixes #101 - Generate rdoc files and html links on the puppetclasses page

Rewite rdocs if required by the prepare phase
Incorporate Fank Sweetser's :: patch
Incorporate a url_helper suggested by Ohad
Added a new interface via links on the supported environments list

fixes #271 - remove active scaffold plugin

fixes #269 - Remove activescaffold from audits page

Fixes #212 - Remove AS from facts

fixes #236 - Installation media are now usable with more than one operating system.