Added new layers
Added GameTrace - which is like the normal physics ray trace, but also asks hit objects to test themselves (this allows us to have sub-collision schemes, like hitboxes)
Removed Attack class
HitInfo now stores Transform bones
Added Blood effect
Added player collision
Added Hit Sphere collision scheme (testing feasibility)
Added collision_setup prefab - this allows us to have a central place to set up collision masks in game instead of code
Added MathLibrary - which might be overkill because I'm only using one function, although if it means we don't have to write our own.. all the better.