Removed out of place comment
Added ajax for changing type of viewd challenges
Added challengeAjax for challenge gallery ajax calls
Merge branch 'master' of https://www.github.com/GlimmerLabs/MathOverImages

Conflicts:
	Site/views/challenge-gallery.ejs
		Someone else moved to gejs.
		I added a link to challengeAjax.js
Add link to challengeAjax.js