Add latest edit to MMH and regen _site
Update MMH links in index
Fix links in index, regen _site
Improve nav and related styling, new index
Improve nav and footer styling
Improve nav styling on narrow screens
Improve nav, styling, add testing experiment
Improve show/hide of tests
Improved styling and various testing experiments
Improvements to testing and related styling
Merge pull request #17 from emmaattwell/gh-pages

Various editorial updates, correx and improvements to MMH and EPC merged.
Improve cover styling, add nav bar to cover
Improve index (cover chooser) page styling

and regen _site
EPC: add latest cover
EPC: Add ch 6 to contents list
EPC: Resyncing ch 1 (not showing on gh-pages)
EPC: fix encoding and regen _site
EPC: Fig 2-1, Move source credit into fig caption
Move Jotform embed code to _includes

Plus regen EPC _site ch 1
Corrected images and answers

Resized images, fitted artboards to artwork bounds; corrected heading
levels in answers section