cannot access protected method WpFastestCache::setSchedule() has been fixed

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@869683 b8457f37-d9ea-0310-8a92-e5e31aec5664
Enable/Disable cache option for logged-in users has been added

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@869808 b8457f37-d9ea-0310-8a92-e5e31aec5664