Mesh Loader:  Start creating averaged normals
Utility:  Remove vec* familly, use glm::vec* instead
Mesh Loader:  Handle smooth and flat shading
Mesh Loader:  Turn into a class
MeshLoader:  Start handling materials and several objects.

ObjLoader:  Will soon return a vector of objects. (WIP)
Object:  Each objects shares a material information. (WIP)
MeshObject:  Knows how to draw itself. (WIP)
Material:  Gives definition of a material and implements a material library
loader. (WIP)
Doc:  Some info about lighting algorithms
Lighting:  Handle orthegonal vector between light and normals