Update to dev version for 2.1 Woocommerce testing.

git-svn-id: https://plugins.svn.wordpress.org/sagepay-direct-for-woocommerce-payment-gateway/trunk@864013 b8457f37-d9ea-0310-8a92-e5e31aec5664
woocommerce 2.1 compatible production release

git-svn-id: https://plugins.svn.wordpress.org/sagepay-direct-for-woocommerce-payment-gateway/trunk@864275 b8457f37-d9ea-0310-8a92-e5e31aec5664