Done the dutch tutorial. Dutch is almost finished.

There are a few spare phrases laying around here and there that need translating, and I wouldn't count on my spelling to be 100% perfect.

We'll also need someone to check for consistency in the naming of things.

Other than that, this language is ready to ship.
Merge pull request #367 from xzbobzx/patch-2

Done the dutch tutorial. Dutch is almost finished.