Ticket #1451

User-friendly support for Creative Commons licenses; users should be able to set CC licenses on a site-wide or per-article basis. If an administrator selects the per-article option, they should be able to choose from a pulldown of the various CC options, as well as traditional copyright.

A new templating directive: 'copyright' could then be invoked in templates, such as <!** print article copyright>, which would return the option the administrator chose. In the case of the CC licenses, the logo and code snippet could be returned.