Basis for octree implementation.
Fixed the Image import
Implemented BoundingBox intersection and some docs
forgot to save Octree before last
Set up intersection checking for octants
Minor cleanup to eliminate warnings
Updated iterator format for new implementation
Implemented octree branching
Implemented basis for branching
Changed octree to take median of corner positions
Implemented median
Implemented part of physics computations
Implemented some car forces
fix renderable
Merge branch 'octree' of https://github.com/colavitam/Racing into networking
fixing client