Added DES AUTH command support

I've developed this code using a blank DESFire v1.4 card, and was able to test it by changing the PICC master key to a new value.  I was drunk when I wrote this so it works but it might not be pretty.  This code only adds single DES support to the auth command, so remember to make the last 8 bits of a new key the same as the first 8 bits, otherwise the command will fail when you try to auth with the new key.  I have yet to test this command on a card that has been set to 3DES operation.  I assume it will fail but I do not know or care where it will fail right now, I'm just way to drunk to add anything more.