Animal Husbandry

v0.3.0 -  Scritchy Scratchy

Blocks: Added Brushing Post block to automate the brushing system.

Features: Added Pregnancy Cycle. Now, animals don't spawn their babies instantly. They have a pregnancy system that takes one day for the baby to get out. 

Changes: Added pregnancy status to female animals in Magnifying Glass. 

Fixes: Fixed a bug that allowed to milk the cows infinitely.  Fixed a bug that allowed eggs to spawn chickens when break. (I hope)