Adds jsonp support to cast and collection API

Line breaks in description field now displayed
Adds jsonp support to user api
User API ruleset bugfix
Themeing update
Small style updates
Merge branch 'master' into new-ui

Conflicts:
	traveler/static/js/templates/collectionHeaderList.js.html
	traveler/templates/ajax/cast_frontpage.django.html
	traveler/templates/frontpage.django.html
	traveler/templates/root.django.html
	traveler/templates/traveler.django.js
Fixes post-merge issues with markup
Removes uneeded files from theme
Adds themeing to new UI of visuals and terms