* Changed transformation related node constructor protocol.
* Work in progress : animating scene parameters (see samples/dance).
* Work in progress : Blender export.
* WIP : Scale (sandbox is samples/dance)
* WIP : enhanced blender exporter
* WIP : Blender exporter : flat/smooth faces handling.
* Each animation related class in its very own file (samples/dance updated accordingly).
* WIP : blender exporter : added missing alpha channel (forced 1.0) in exported data.
* Added samples/loading
* Added sample meshes
* Moved blender exporter from sandbox to tools/export/blender
* WIP : objects exporting (from Blender) and loading.
* WIP : multipass materials.