Source code checked in, #87706062ebff

-TriangleMeshConvexContactManifold (and associated types) revamped to use the Quick collections. -QuickSet and QuickDictionary resizing should now not allocate enormous arrays unnecessarily. -Fixed a QuickList Count assert. -Dropped BufferPool max buffer size to 2^30. -Added PhysicsThreadResources. Uses ThreadStatic pools. Expect further changes; some resources will move into BufferPools<T> style types, others resources will be replaced entirely by the Quick collections.