Feature/configuration organisation

Massive overhaul of the CSS Framework. 

* Move all framework defaults into framework. Leave blank "starter" site-specific configuration file for customisations.
* Create conditionals for all components so that they can be optionally excluded/included.
* Rename components to fit an "physics" model (eg: atoms, molecules, compounds) to better illustrate organisation.
* Remove need for `/partials/` directory
* Improve comment documentation
* Improve z-indexing
* Remove default generation of IE stylesheet - improves compilation time whilst developing