add static to methods to avoid debugging notices

git-svn-id: https://plugins.svn.wordpress.org/advertising-manager/trunk@1042887 b8457f37-d9ea-0310-8a92-e5e31aec5664
add static to methods to avoid debugging notices

git-svn-id: https://plugins.svn.wordpress.org/advertising-manager/trunk@1042888 b8457f37-d9ea-0310-8a92-e5e31aec5664
whitespace

git-svn-id: https://plugins.svn.wordpress.org/advertising-manager/trunk@1042890 b8457f37-d9ea-0310-8a92-e5e31aec5664