Moved screenshots into assets/ folder

git-svn-id: https://plugins.svn.wordpress.org/custom-post-types-relationships-cptr/trunk@960198 b8457f37-d9ea-0310-8a92-e5e31aec5664
Moved screenshots into assets/ folder

git-svn-id: https://plugins.svn.wordpress.org/custom-post-types-relationships-cptr/trunk@960200 b8457f37-d9ea-0310-8a92-e5e31aec5664