Adapted collision / triangulation for primitives.
Removed collision / triangulation from entities.
Created a concave-capable polygon class.
Implement polygon bounding box.
Merged with latest master.
All previous commits compile. Collision works.
Tested, fixed, confirmed Q vs T.
Pong confirmed working with copy ctor fix.
The actual copy ctor fix.
Merged new collision API to master. 4.0.0-alpha.