Added new assets.
Added asset code.
Added movement for police.
Added movement for bullet.
Add getDirection() to ZTAIMove.
Added new AI movement to human factory.
Adding new asset variables to ZTAssets.
Merge branch '1.0.0/revise_human_ai' into 1.0.0/develop
Adding human constant types.
Adding ZTPriest object.
Adding priest variables to world.
Adding ZTPolice object.
Adding police world variables.
Adding ZTBullet object.
Adding bullet world variables.
Adding new humans and updates the world.
Rendering new human objects to game screen.