faq has been updated

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@839835 b8457f37-d9ea-0310-8a92-e5e31aec5664
icon has been changed

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@839837 b8457f37-d9ea-0310-8a92-e5e31aec5664