Creative Commons Licensing for edX

This PR adds Creative Commons Licensing to the Open edX Platform.

Review tickets
T&L https://openedx.atlassian.net/browse/TNL-195
UX https://openedx.atlassian.net/browse/UX-948
Why is the `href` empty? Also, You're probably better off returning a DOM element, using jQuery's constructors, rather than an HTML string.