2.87
fix whitespace formatting in cmake files
fix loading of empty file (after header) remove debug printf
cmake fixes
Split Bullet/src/LinearMath/btSerializer.cpp into btSerializer64.cpp to make it easier to rebuild serialization structure. Add several MSVC optimization flags to cmake. Bump up VERSION because serialization format changed Expose btScalar& jointMaxForce, btScalar& jointMaxVelocity to 'getJointInfo2' API, add backwards compatibility to examples\Importers\ImportURDFDemo\URDFImporterInterface::getJointInfo.
add the 'extras' and Bullet 2 tests, to make it easier to create a new intermediate release