Added exclusion list and option to remove GET ? part from URLs

git-svn-id: https://plugins.svn.wordpress.org/async-js-and-css/trunk@779816 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version number changed to 1.7

git-svn-id: https://plugins.svn.wordpress.org/async-js-and-css/trunk@779817 b8457f37-d9ea-0310-8a92-e5e31aec5664