Kitties piece: Heritable traits

[JoshOrndorff]

Currently kitty DNA of newly born kitties is basically a psuedorandom hash output involving some seed info from their parents. In the original game, the DNA actually encoded traits and those traits could be inherited from parents to offspring.

Shawn Tabrizi has a good writeup of the process in his original frame-based kitties tutorial: https://www.shawntabrizi.com/substrate-collectables-workshop/#/3/breeding-a-kitty

cc @NadigerAmit

[NadigerAmit]

I have read this earlier, its a good tutorial. Thanks :)