Rework on the nav for mobile
Merge branch 'develop' of github.com:PaulKinlan/WebDocs into develop

* 'develop' of github.com:PaulKinlan/WebDocs:
  Merging in pre-fix changes
  Fixing an issue with content breaking on /getting-started/your-first-multi-screen-site/responsive.html - the code include should not be indented in the markdown, as markdown double-wraps it by treating it as code. #inception
Improvement to header and main navifation