Merge pull request #1 from mousebird/gh-pages

Merging @mousebird's updated content.
Merge pull request #2 from mousebird/gh-pages

Lots of changes
adding prev/next imagesets + css
adding logic to go linearly through pages via prev/next
Merge pull request #3 from mousebird/gh-pages

Wrapped up Tutorials
add '/tutorial/' stub to work on github
introduce carousel with placeholders
introducing video, homepage styles
video caption styling
padding for homepage bottom