3.21
Merge branch 'master' of github.com:erwincoumans/bullet3 into master
Create LICENSE.txt
Update Bullet URL in copyright statements
Extras/VHACD/inc/vhacdMutex.h: fix musl build
don't use empty frame for pose in sdf files use hint for clang that if (0) is intentional
added default ON values for cmake OPTIONS to fix linker errors on ci builds
add the 'extras' and Bullet 2 tests, to make it easier to create a new intermediate release
add premake4.lua build for BulletRobotics target, C++ API, similar to PyBullet. Use BulletRobotics target for App_HelloBulletRobotics (without GUI) and App_RobotSimulator