v1.8.3

git-svn-id: https://plugins.svn.wordpress.org/wp-performance-pack/trunk@970413 b8457f37-d9ea-0310-8a92-e5e31aec5664
modules dir no longer needed

git-svn-id: https://plugins.svn.wordpress.org/wp-performance-pack/trunk@970417 b8457f37-d9ea-0310-8a92-e5e31aec5664