add blackjack to gambling credits

[mikael]

@KSZ do not underestimate this idea.

gambling system with odds to the house (ksz)

Will raise Credits purchasing by atleast 2x (just think how much will @Momonga gamble)

A fun experience for those who like to gamble i myself included who find this entertaining.
Please add it!

 

[Pinkk]

Don't add it will rune kids lives