2.86
fix many warnings remove btMultiSapBroadphase.* make collisionFilterGroup/collisionFilterMark int (instead of short int)
Update btMultiBody.h
allow to terminate btSolveProjectedGaussSeidel MLCP solver based on a least squares residual threshold (m_leastSquaresResidualThreshold)
fix warnings (thanks to Aaron!)
various fixes move btSimulationIslandManagerMt.cpp from BulletCollision to BulletDynamics
premake: use *.cpp insteadl of **.cpp