WordPress Plugin repo banners

git-svn-id: http://svn.wp-plugins.org/wpmovielibrary@937123 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge remote-tracking branch 'github/master'

git-svn-id: http://svn.wp-plugins.org/wpmovielibrary@937147 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update readme + resize screenshots