3.21
Revert "Export targets in CMake and add include directories to target properties"
Create LICENSE.txt
Code-style consistency improvement: Apply clang-format-all.sh using the _clang-format file through all the cpp/.h files. make sure not to apply it to certain serialization structures, since some parser expects the * as part of the name, instead of type. This commit contains no other changes aside from adding and applying clang-format-all.sh
add the 'extras' and Bullet 2 tests, to make it easier to create a new intermediate release
Remove useless const qualifiers from returns
fix premake build for linux, thanks to @consultit See also issue #1538