RepRapWorld's KeyPad Holder

I didn't find any thing made for the keypad RepRapWorld has made ( http://reprap.org/wiki/Keypad, http://reprapworld.com/?products_details&products_id=202&cPath=1591_1626 ), so I did one myself. Works quite well I must say, although the the code ended up with some hardcoded values, which I don't really like. However, I thought, I put it up anyway. The keypad probably won't change much anyway, as otherwise I would like it to be more configurable. But, beeing based on the parametic "Simple Keypad