Update pot and nl_NL

git-svn-id: https://plugins.svn.wordpress.org/gwolle-gb/trunk@1051034 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update readme

git-svn-id: https://plugins.svn.wordpress.org/gwolle-gb/trunk@1051036 b8457f37-d9ea-0310-8a92-e5e31aec5664