Add new Getting Started page

Modified content in start-en.hbs to match the new theme, 
Added page specific css in content/_base,scss
Modified colours in main/_base.scss and footer/_base.scss
Modified link colours in _variables.scss 
@pjackson28 Oh I see, I didn't know ordering heading levels are important besides at least using one H1 heading level. I read online that it isn't really necessary ordering heading levels since it doesn't effect SEO or major search engines. May I ask why this should be strongly followed for WET? But in this case, I will use an h2 heading and give it a class to keep it the same size as I'd like it to be, right?