documentation updates

git-svn-id: https://plugins.svn.wordpress.org/advertising-manager/trunk@956928 b8457f37-d9ea-0310-8a92-e5e31aec5664
documentation updates

git-svn-id: https://plugins.svn.wordpress.org/advertising-manager/trunk@956932 b8457f37-d9ea-0310-8a92-e5e31aec5664