removing m&s logo

git-svn-id: https://plugins.svn.wordpress.org/google-analytics-link/trunk@864298 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme

git-svn-id: https://plugins.svn.wordpress.org/google-analytics-link/trunk@866314 b8457f37-d9ea-0310-8a92-e5e31aec5664