Editing credits

git-svn-id: https://plugins.svn.wordpress.org/wp-hgrant/trunk@889182 b8457f37-d9ea-0310-8a92-e5e31aec5664
Edit readme.txt

git-svn-id: https://plugins.svn.wordpress.org/wp-hgrant/trunk@889183 b8457f37-d9ea-0310-8a92-e5e31aec5664