Changed plugin links

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@765546 b8457f37-d9ea-0310-8a92-e5e31aec5664
Minimized CSS assets

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@765547 b8457f37-d9ea-0310-8a92-e5e31aec5664