* Fixed more undefined indexes.
* Updated plugin information.

git-svn-id: https://plugins.svn.wordpress.org/datafeedr-product-sets/trunk@861044 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed more undefined indexes.

git-svn-id: https://plugins.svn.wordpress.org/datafeedr-product-sets/trunk@861928 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme file.

git-svn-id: https://plugins.svn.wordpress.org/datafeedr-product-sets/trunk@861971 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme file.

git-svn-id: https://plugins.svn.wordpress.org/datafeedr-product-sets/trunk@862378 b8457f37-d9ea-0310-8a92-e5e31aec5664