Another attempt to get the screenshots to work.

git-svn-id: https://plugins.svn.wordpress.org/meteodata/trunk@882156 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove screenshot bit from readme.

git-svn-id: https://plugins.svn.wordpress.org/meteodata/trunk@882160 b8457f37-d9ea-0310-8a92-e5e31aec5664