Added dutch translation file

git-svn-id: https://plugins.svn.wordpress.org/resize-images-while-uploading/trunk@787495 b8457f37-d9ea-0310-8a92-e5e31aec5664
Cleaned up some comments...

git-svn-id: https://plugins.svn.wordpress.org/resize-images-while-uploading/trunk@791218 b8457f37-d9ea-0310-8a92-e5e31aec5664