12.8.0

• Bugfix: btAssert from HingeJoint.setAngularOnly(true) (Minie issue 20)
• Added a dynamic collision-filtering hook to the CollisionSpace class.
• Added an immediate ongoing-contact handler to the PhysicsSpace class.
• Added 4 native setters to the PhysicsCollisionEvent class.
• Changed PrimitiveAllocator to throw an exception on any destruction attempt.
• Added a Platform mechanism to determine the generic name of the operating system.