update 1.5

git-svn-id: https://plugins.svn.wordpress.org/qqworld-speed-4-china/trunk@1038821 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme.txt

git-svn-id: https://plugins.svn.wordpress.org/qqworld-speed-4-china/trunk@1038822 b8457f37-d9ea-0310-8a92-e5e31aec5664