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
Disabled controls (arrows) from main presentation screen. In preparation for control panel
Linked README attributions