A lot of changes.. Adding spatial data structure.
Working BVHTree. Still working on collisions though.
Partially working BVHTree :)
Mostly working tree collision.
Much better camera.
Adding boundaries and an aerial camera.
Tuning camera angle changes.
Merge branch 'master' into BVHTree

Conflicts:
	src/Bush.cpp
	src/Bush.h
	src/TreeGenerator.cpp
	src/TreeGenerator.h
	src/bounding_rectangle.h
	src/deer.cpp
	src/deer.h
	src/game.cpp
	src/game.h
fixed it all