OpenGL examples using the GLUS library

GLUS again now in separate repository.

OpenGL examples using the GLUS library

Added Example 50 with HDR support.

OpenGL examples using the GLUS library

Added Example48 - glTF 2.0 PBR renderer with Image-Based Lighting (Einstein model)
Added Example49 - glTF 2.0 PBR + IBL + Skeletal Animation (Phoenix model)

OpenGL examples using the GLUS library

Minor fixes to Example47

OpenGL examples using the GLUS library

Added Example47 - 3D spatial colour sort — RGB cube (OpenGL 4.6)

OpenGL examples using the GLUS library

v3.0.4

OpenGL examples using the GLUS library

v3.0.3

OpenGL with GLUS 2.0

Fixed several issues mainly using AI.

OpenGL with GLUS 2.0

v3.0.1

Improve CMake

OpenGL with GLUS 2.0

v3.0

Updated README with an overview and links