Update README.md

Improvements to grammar and spelling. Added `layout` front matter field to the list of fields. Enjoy!
Update README.md

Update layout description, now that I understand it.
Merge pull request #1 from paulrayner/gh-pages

Minor tweaks to main README
Removing static copy of RevealJS in favor of submodule
Added RevealJS as submodule
Merge pull request #2 from jordanmccullough/submod

Changed revealjs to submodule instead of static copy
Add install instructions to README
Merge pull request #3 from paulrayner/install-update

Add install instructions to README
First draft T-of-C functional
Added chapter and slide titles
Removing tracking of sass caching
Ignore pattern for sass cache
Ignoring jekyll artifacts _site
First draft of T-of-C
Cleaned up T-of-C styling with SCSS colors, tidy syntax
Initial T-of-C styling
Removed center of T-of-C button, positioned top right
Initial crude T-of-C implementation
Renamed include for clarity. Now encompasses all script imports for HydeSlides
First commit Table-of-Contents plugin