jgltf-browser 2.0 preview release 1

A preview release of the jgltf-browser with support for glTF 2.0.

Note that the implementation of PBR (Physically Based Rendering) in the viewer is still very basic. The shader currently only has a single, default light, which may not be appropriate for many scenes. There is no support for environment lights yet, so purely metallic objects may appear black. Details like alpha blending and special texture modes still have to be reviewed.

These limitations only refer to the viewer.

The other features of the jgltf-browser should already work:

• Loading of glTF 1.0 or glTF 2.0 assets
• Browsing through the file structure
• Viewing the contents of accessors or images
• Converting OBJ files into glTF 2.0 assets
• Saving glTF assets in standard, embedded or binary format