Fix CSS styling for product recommendations display. Add option for restricting similar product recommendations by category.

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-recommendations-by-graphflow/trunk@1024495 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bump stable version back down to 1.0.4

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-recommendations-by-graphflow/trunk@1024496 b8457f37-d9ea-0310-8a92-e5e31aec5664