Finish up mediacrush.js
Fix up temp code
Handle iframe resizing gracefully, fix fullscreen on embedded video
Add maxMedia{width,height} and preserveAspectRatio
Update /docs with new embedding system
Add callbacks for MediaCrush.render
Merge branch 'master' into mediacrush.js

Conflicts:
	templates/fragments/image.html
Merge branch 'master' into mediacrush.js
Merge pull request #367 from MediaCrush/mediacrush.js

Finish up mediacrush.js