readme.txt for 3.5.2

git-svn-id: https://plugins.svn.wordpress.org/sisow-for-woocommerce/trunk@1002397 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme.txt

git-svn-id: https://plugins.svn.wordpress.org/sisow-for-woocommerce/trunk@1002398 b8457f37-d9ea-0310-8a92-e5e31aec5664