readme changes

git-svn-id: https://plugins.svn.wordpress.org/gigya-socialize-for-wordpress/trunk@934407 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme changes

git-svn-id: https://plugins.svn.wordpress.org/gigya-socialize-for-wordpress/trunk@934420 b8457f37-d9ea-0310-8a92-e5e31aec5664