- support for js and css CDNs

git-svn-id: https://plugins.svn.wordpress.org/duplicator/trunk@746762 b8457f37-d9ea-0310-8a92-e5e31aec5664
- used files

git-svn-id: https://plugins.svn.wordpress.org/duplicator/trunk@746763 b8457f37-d9ea-0310-8a92-e5e31aec5664