Refactoring:

Moved optional code to Extras: AlgebraicCCD,EPA,quickstep
Moved SimpleBroadphase data to OverlappingPairCache, and derive both SimpleBroadphase and AxisSweep3 from OverlappingPairCache.
Added ParallelPhysicsEnvironment (prepair more parallel mainloop)
Upgraded hardcoded limit from 1024/8192 to 32766/65535 (max objects / max overlapping pairs)

Bullet/BroadphaseCollision/AxisSweep3.cpp

@@ -48,6 +48,7 @@ void	AxisSweep3::SetAabb(BroadphaseProxy* proxy,const SimdVector3& aabbMin,const
 
 
 AxisSweep3::AxisSweep3(const SimdPoint3& worldAabbMin,const SimdPoint3& worldAabbMax, int maxHandles, int maxOverlaps)
+:OverlappingPairCache(maxOverlaps)
 {
 	//assert(bounds.HasVolume());