Readme update

git-svn-id: https://plugins.svn.wordpress.org/related-posts-lite/trunk@1017212 b8457f37-d9ea-0310-8a92-e5e31aec5664
Timthumb quickfix

git-svn-id: https://plugins.svn.wordpress.org/related-posts-lite/trunk@1017214 b8457f37-d9ea-0310-8a92-e5e31aec5664