Added better explanation in admin settings in regards to caching in your theme and on plugrush.com

git-svn-id: https://plugins.svn.wordpress.org/plugrush/trunk@929491 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed errors in changelog

git-svn-id: https://plugins.svn.wordpress.org/plugrush/trunk@929494 b8457f37-d9ea-0310-8a92-e5e31aec5664