prettify demo

[notwaldorf]

(This is a super old branch I had opened before the holidays) Added demo-snippet. Had to temporarily comment out the dom-bind demo, since it's busted on IE (because of nested templates in webcomponents.js), but I'll add it back as soon as that's fixed.

Looks like this (and more):

[cdata]

Small question, otherwise LGTM :+1:

[addyosmani]

LGTM2 once the quotes have been fixed :+1:

[notwaldorf]

I fixed the delinquent quotes!