https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-plane-and-ray-disk-intersection
used for the code for planar intersection
student namen en nummers:
Stefan Herald(0960543), 
Eke Reus (8567387).
minimum requirements added:
-spheres and planes, together with a rudimentary texture for the plane
    -add spheres in the init of MyApp. For the texture, set the boolean getTexture true.

-lights
    -added simple point lights. Add these in the init of MyApp
-debug
    -added a debug system
    -added circles in the debug system with primary rays
    -added a button (b) to switch between the normal and debug mode