HUGY CHANGESY

-position, speeds are now vectors
-walls, enemies and platyers are Entities
-Enitities are bodies that collide with eachother
-Entities can have a hit_box that is either a circle of a rectangle
-added trollface
-knockback is determined by enemy via restitution
-added Camera object
-camera is now a Camera object instead of cameraX and y
-cam position is now changed based on the displacement of the player
from the center of the screen
-CAMERASLACK describes the distance from the center the playter is
allowed to stray
-epicface is now small
-buttons dimensions are determined by x,y,w,h (x,y is center of button)
- Circ and Rect objects added, these are the objects used for collision
detection