Changed directory structure

src/Makefile

src/camera.cpp

src/camera.hpp

src/color.hpp

src/constant_deformer.hpp

src/deformer.hpp

src/dielectric.hpp

src/hittable.hpp

src/hittable_list.hpp

src/linear_deformer.hpp

src/main.cpp

src/material.hpp

src/quadratic_deformer.hpp

src/quartic_deformer.hpp

src/radiator.hpp

src/ray.cpp

src/ray.hpp

src/raytracing.hpp

src/triangle.hpp

src/triangle_mesh.hpp