In standard shader, material glossiness is a value from 0 to 1000 like
in MLT files. So, it doesn't need to be normalized.

remove user-specific ant files

fix example

- fix gamepad axis query in example broken by db4585b Improved gamepad support

- Ambient and lambert lighting added.
- Ambient and diffuse colors linked to standard shader.
- Single light linked to standard shader.
- LoadStandardMaterial() and depending functions added.

...on model drawing

MTL loading shininess to material glossiness

Material glossiness is a float type value...

Improved materials

Redesign audio system to support multiple mix channels

Only works when raylib is installed on windows system.

texture2D() is deprecated on GLSL 330

Fix building examples on OSX

_g naming convention for globals, new error exit numbers.

Base Audio Context System