update to 1.3.3

git-svn-id: https://plugins.svn.wordpress.org/bwp-minify/trunk@995559 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme file to 1.3.3

git-svn-id: https://plugins.svn.wordpress.org/bwp-minify/trunk@995565 b8457f37-d9ea-0310-8a92-e5e31aec5664