Refactoring Mesh.

CMakeLists.txt

Collision/MeshCollisionModel.cpp

Collision/MeshCollisionModel.h

Collision/MeshToMeshCollision.cpp

Collision/SpatialHashCollision.cpp

Collision/SpatialHashCollision.h

Collision/SurfaceTree.h

Collision/SurfaceTree.hpp

Collision/UnitTests/CollisionPairSpec.cpp

Collision/UnitTests/MeshCollisionModelSpec.cpp

Collision/UnitTests/MeshToMeshCollisionSpec.cpp

Core/BaseMesh.cpp

Core/BaseMesh.h

Core/CollisionPair.cpp

Core/CollisionPair.h

Core/CoreClass.h

Core/DataStructures.h

Core/Model.cpp

Core/Model.h

Core/ObjectSimulator.h