Drop unused screenshots

git-svn-id: https://plugins.svn.wordpress.org/gwolle-gb/trunk@1026393 b8457f37-d9ea-0310-8a92-e5e31aec5664
Drop unused  action

git-svn-id: https://plugins.svn.wordpress.org/gwolle-gb/trunk@1026395 b8457f37-d9ea-0310-8a92-e5e31aec5664
Cleanup unused graphics for admin

git-svn-id: https://plugins.svn.wordpress.org/gwolle-gb/trunk@1026396 b8457f37-d9ea-0310-8a92-e5e31aec5664
Cleanup unused AJAX file

git-svn-id: https://plugins.svn.wordpress.org/gwolle-gb/trunk@1026397 b8457f37-d9ea-0310-8a92-e5e31aec5664
Cleanup unused Compatibility

git-svn-id: https://plugins.svn.wordpress.org/gwolle-gb/trunk@1026398 b8457f37-d9ea-0310-8a92-e5e31aec5664