Corrected issue on web compilation

* Update GLTF support to include loading color for albdeo (saved in the color value of the materialmap), support occlussion and emmission maps.. as well as some quality of life updates.

* clean up to use single image

Note that emscripten upstream branch implements the new asyncify implementation, expected to be faster than emterpreter one.

Some functions renamed

Fix 1102

Align formating with other raylib modules coding style.

There could be some cases where we need to define the internal audio buffer size, now it's possible.

RENAMED: InitAudioBuffer() to LoadAudioBuffer()
RENAMED: CloseAudioBuffer() to UnloadAudioBuffer()

Renamed some defines and reviewed some comments.

Check if provided path is a full path containing system root letter: C:\