delete obsolete resources

git-svn-id: https://plugins.svn.wordpress.org/credit-tracker/trunk@823310 b8457f37-d9ea-0310-8a92-e5e31aec5664
Preparing for 0.9.7 release

git-svn-id: https://plugins.svn.wordpress.org/credit-tracker/trunk@823311 b8457f37-d9ea-0310-8a92-e5e31aec5664