remove need for signup, generate api key automatically, update wording

git-svn-id: https://plugins.svn.wordpress.org/productwidgets/trunk@990253 b8457f37-d9ea-0310-8a92-e5e31aec5664
tagged version v1.1.0

git-svn-id: https://plugins.svn.wordpress.org/productwidgets/trunk@990254 b8457f37-d9ea-0310-8a92-e5e31aec5664