BulletSim: rework parameter setting for different types of values
(like vectors or quaternions).
BulletSim: add calls for creating all the different Bullet constraint types.
Updated the DLLs and SOs and code for BulletXNA to create the types.
All the detailed control calls are not all in place yet.
BulletSim: experimental lock axis code using constraints. Not enabled
by default. Like more debugging is needed.