Merge pull request #129 from sarahelizabeth/master

Created footer next/prev navigation, minor CSS fixes, expander fixes
Merge pull request #130 from sarahelizabeth/master

Made stages option more clear for nav, tried to fix index overlay fadein...
Merge pull request #131 from sarahelizabeth/master

CSS fixes: nav bar bug in phones, scroll down bug on tablet, index overl...