Added GetVertexCount to GLMesh
Added AABBTree

AABBTree will take a GLMesh (for the time) and create a AABB collision
octree tree from it.

tribox.h is a well crafted triangle-aabb intersection test function.
Add the ability to get vertex normals to GLMesh
Added the ability for an AABBTree to generate a GLMesh

The mesh generated by AABBTree is used for debug purposes. It is a brute
force method that will just add each solid cube at a given level
(currently 2).
Made the AABBTree debug GLMesh generation smarter

The mesh generator now goes down to each leaf node.
Fixed subdividing AABBTree

Subdividing must happen in steps to avoid artifacts.