Fixed https mixed content bug.

Chrome would throw:
>[blocked] The page at 'https://www.example.com/w/mw-config/index.php?page=Options' was loaded over HTTPS, but ran insecure content from 'http://creativecommons.org/license/?partner=MediaWiki&exit_url=https%3A%2F%…heet=https%3A%2F%2Fwww.example%2Fw%2Fskins%2Fcommon%2Fconfig-cc.css': this content should also be loaded over HTTPS.

Also changed from http urls to https for good measure.