Added a simple cube with vertex colors for testing both.

* Implement a load values from accessor function.
Added some more value types for the different GLTF attributes.
Fixed crash when loading animated triangle.

* Split GLTF model loading into separate functions for readability.

* Fixed the already working models that I broke when introducing GLTFReadValue.
Improved the example for gltf models to be able to switch between a few models.

* Removed license from screen. It is pu inside a license file anyway.

* Small improvements on the naming of functions
Removed (*model). and replaced it with model->

* Added bone binding to whole mesh and not only set vertices.
+ Also added missed setting of the animation count.
+ Removed double ; on one line

* Added more of the gltf sample models

https://github.com/KhronosGroup/glTF-Sample-Models
We need to make it working for all of them.

* Binding to initial bind pose added.

* Fix cube disappearing bug because lerpPercent could be Inf.

* Fixed for rigged figure also

Updates skybox demo to show how to do both HDR and non HDR skyboxes

Co-authored-by: Jeffery Myers <JefMyers@blizzard.com>

* Added example for gltf animation and split some functions for loading model animations into IQM and GLTF similar to how models are being loaded.

* Removed wrongly duplicated function

* Bone loading for gltf model (not working at this point)

* Loading info about vertex to joint connection but animation is still not working

* Skeleton and pose is correctly loaded. Need to communicate about interpolation in GLTF

* The model almost looks like a real person on animation.

* Fixed model loading with bones.

Also updated license info on the model.

* Cleaned up some code and updated examples.

* Fix identation issues

* Fix identation issues

* Fix identation issues

Now supports dynamic panoramic view, just drag and drop

* Fix bug #1270

Added an argument to the shader in order to flip the texture

* Fix Bug #1270

* Fix bug #1270

When using FormatText() several times in same function, returned string is static and so, the same is returned, resulting in failures on shader loading.

Issue was related to vertex tangent attibutes not uploaded to GPU, a quick solution was implemented for new vertex attributes loading for already existing meshes... I don't like it specially but it will work for now.

Multiple functions added and some reviewed to adapt to the new multi-mesh, multi-material and animated models.

Actually, that function should be redesigned...

Note that HDR exposured possibilities are not used on this example...

Replaced by medieval 3d assets

Could correct possible issues on OpenGL 1.1

Moved PBR material loading to example, right decision?