* complete fog example
as both fog and basic lighting need the light system it made sense
to seperate it out, there are a few functions from raymath
int rlmath.py
* added shaders custom uniform
* added shaders_texture_waves.py
* added shaders_texture_drawing.py
* bug fix - unwanted transparent effect!
Co-authored-by: codifies <nospam@antispam.com>
