Update preview, add analytics functionality, reword quality

git-svn-id: https://plugins.svn.wordpress.org/advertising-manager/trunk@1000862 b8457f37-d9ea-0310-8a92-e5e31aec5664
removed some old files

git-svn-id: https://plugins.svn.wordpress.org/advertising-manager/trunk@1000864 b8457f37-d9ea-0310-8a92-e5e31aec5664