Improve the contributing read me.
Simplified the generator options.
Improve the dummy app's index page.
Remove unnecessary files from the dummy app.
Clean-up JS.
Add header a footer components to the global layout.
Add a "spacing" component.
Core changes & many component improvements.

- Remove colour sets.
- Add color-link and decorate-link mixins.
- Improve styleguide.
- Add spacing to the application layout.
- Add spacing to the layout component.
Add "no index,nofollow" meta tag to the global layout.
Make the heading optional in the application layout.
Add headings, typefaces etc.

- Add typefaces.
- Add heading component.
- Remove REM function.
- Simplify core load order.