Update ad image url        <img src='http://cdn.rtcamp.com/wp-content/uploads/2013/09/rtMedia-pro-ad-300x300px-2-RS.png?' alt='rtMedia Pro is released' />


git-svn-id: https://plugins.svn.wordpress.org/buddypress-media/trunk@777807 b8457f37-d9ea-0310-8a92-e5e31aec5664