Use a shorter/simpler license convention, stops the header taking so
much space.
Follow the SPDX license specification: https://spdx.org/licenses
- C/C++/objc/objc++
- Python
- Shell Scripts
- CMake, GNUmakefile
While most of the source tree has been included
- `./extern/` was left out.
- `./intern/cycles` & `./intern/atomic` are also excluded because they
use different header conventions.
doc/license/SPDX-license-identifiers.txt has been added to list SPDX all
used identifiers.
See P2788 for the script that automated these edits.
Reviewed By: brecht, mont29, sergey
Ref D14069
Pixar recently released USD 20.02 [1]. I think it's important for people
to be able to figure out which version of the USD library is used in
Blender.
[1] https://github.com/PixarAnimationStudios/USD/releases/tag/v20.02
This commit exposes the USD library information via `bpy.app.usd`, and
includes that info in the `system-info.txt` saved via Help → Save System
Info.
Reviewed by: brecht
Differential Revision: https://developer.blender.org/D6724
