Replaced vector<Shader> => Shader.
ModelData struct inside ModelInstance
Renderer handling draws. ModelAsset -> Mesh.
ShaderHelper::setModelData
ModelInstance -> Model
GUIAsset, GUIInstance -> GUIElement. new GUIScene.
Test with GUIElement, GUIScene on main.cpp
GUIManager, loadGUIScene working. TODO: Improve A LOT!
GUIManager
Setter/getters in Camera and Light,ShadowMapFBO