Merge pull request #31 from thisispayal/gh-pages

Merge in overview in main index.html
overview nheader link acts correctly, clicking a header link for navigation works immediately
remove console output
Merge pull request #32 from DSegal92/gh-pages

Fixed header behaviour
adjusting overview height
Merge pull request #33 from DSegal92/gh-pages

Changed overview offset
Merge pull request #14 from vigilant/gh-pages

Merging in Dan's fixes for scrollspy and testimonials space