Started to add CSS for progress bar on tutorials.
Merge branch 'master' of github.com:GlimmerLabs/MathOverImages

Conflicts:
	Site/public/css/tutorial-alt.css
Merge branch 'master' of github.com:GlimmerLabs/MathOverImages
Add site tutorial.
Merge branch 'master' of github.com:GlimmerLabs/MathOverImages