Release new stable version

git-svn-id: https://plugins.svn.wordpress.org/addquicktag/trunk@935166 b8457f37-d9ea-0310-8a92-e5e31aec5664
enhance readmes

git-svn-id: https://plugins.svn.wordpress.org/addquicktag/trunk@935168 b8457f37-d9ea-0310-8a92-e5e31aec5664
enhance readmes

git-svn-id: https://plugins.svn.wordpress.org/addquicktag/trunk@935173 b8457f37-d9ea-0310-8a92-e5e31aec5664