Generated using:
https://github.com/amzn/oss-attribution-builder
This is based on the libraries in extern and the svn libraries.
For the libraries in extern the README.blender was used as reference.
For the libraries in svn I used cmake/versions.cmake.
Note that the crediting is a bit of hit and miss. For some projects this
is very clear, while for others I had to do some digging. Either way I
gave my best shot.
The sources to (re-)generate this file is local at the moment. But it
should be moved to our infra-structure at some point.