V1.0.2

[kwblackstone]

v1.0.2 fbx:

• allow option to export fbx with images embedded in fbx file gltf:
• tinygltf to 2.8.21
• avoid including data uris as filenames metadata
• use gltf mesh instancing for single usd meshes
• use default time argument of 0 when retrieving primvar values sbsar:
• Open source the sbsar plugin, off by default and requires the user to install the substance SDK utility:
• refactor usd_fileformats_enable_mtlx into an option
• Fixes for issues with remapping normals and colors for triangulated meshes on export
• testing fixes