Adding first version of my plugin

git-svn-id: https://plugins.svn.wordpress.org/related-images/trunk@965282 b8457f37-d9ea-0310-8a92-e5e31aec5664
read me

git-svn-id: https://plugins.svn.wordpress.org/related-images/trunk@965298 b8457f37-d9ea-0310-8a92-e5e31aec5664
Adding banner

git-svn-id: https://plugins.svn.wordpress.org/related-images/trunk@965301 b8457f37-d9ea-0310-8a92-e5e31aec5664