Lights handling is significanlty more difficult than the other
tutorials since I introduce a lot of things at the same time.

Now the application has a light source helper class.
Which does not seem to generate any errors but is not working.
I am not setting good uniform values to good places I guess
Or there is some kind of logical mistake in handling.
Light sources.

Shader versions are now #version 330 core
Gllights had a moment of work but when I use the
formula from Foley JD 1996, it does not work
for some reason.
Shaders requires a little more work

Some unknown reason directions are all wrong.
When the light object goes behind the object
it is the front side that is lit.
It is either shader or the code is at fault here.
But at least the object is lit.
The ambient light can be parametrized to use coefficients
as well for better control.
Diffuse light and the specular light can be used in
the same manner as well.

Lights are still not working. I think I am going to implement
Learn OpenGL example.

There is a problem with attenuation values they simply cancel out
the fragment value.
They either set it to white entirely. And it does not matter the
specular or diffuse color. They simply cancel it.
There is probably a problem with their correct setting.
The good news is that the shaders are not at fault here.

Lights tutorial should be written the core functions for multi lights are
done, they don't work now. I am not sure why. But the wiring with the
front end should not be too difficult in any case.