Dutch language translation

git-svn-id: https://plugins.svn.wordpress.org/awesome-weather/trunk@885142 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme updated

git-svn-id: https://plugins.svn.wordpress.org/awesome-weather/trunk@885144 b8457f37-d9ea-0310-8a92-e5e31aec5664