Dutch (Netherlands) translation
Made the new translation to overwrite the old one to make it easier to see the difference
Update app.txt

Translation credits to Studio 384 and S. Paternotte.
(cherry picked from commit ca283333297d1d492255b193de91df771134634a)
Update uninstall.txt

Cosmetics: Removed superfluous tab-characters
(cherry picked from commit 195e918ca16d902f18ce5113ea4db935346a6aba)
Update app.txt

Twitter and E-mail texts translated in Dutch
(cherry picked from commit 9c7bbb02b0e2b5296c174d95f2809f1498e96766)
Removed unnecessary backslashes
Restored the email address of Studio 384
Translated Privacy Policy
Merge pull request #120 from unchecky/dutch_new

Dutch (Netherlands) translation