Added missing DLL suffix for VS2015 build.

Introduce workaround again to fix the build.

Try to close resource leak.

attributes of the loader instance.

glTF exporter + improved the importer (and code refactor)

Basic glTF support (experimental)

instance_image support for sample2D in Collada 1.5

FBX import: If animation is not defining keys for all vector components (x, y and z), use the node transform as the default value.

Support for FBX embedded textures