Updating compatibility tag for 4.1

git-svn-id: https://plugins.svn.wordpress.org/table-rate-shipping-for-woocommerce/trunk@1051707 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating compatibility tag for 4.1

git-svn-id: https://plugins.svn.wordpress.org/table-rate-shipping-for-woocommerce/trunk@1051712 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixing readme formatting

git-svn-id: https://plugins.svn.wordpress.org/table-rate-shipping-for-woocommerce/trunk@1051719 b8457f37-d9ea-0310-8a92-e5e31aec5664