- DemoApplication, debug text rendering was broken, glLoadIdentity() missing

- copy user data over to child shape
- added applied impulse to btManifoldPoint
- add ContactProcessedCallback (needs test/demo)
- didn't copy over m_additionalDampingFactor into btRigidBody.

src/BulletDynamics/ConstraintSolver/btSolverConstraint.h

@@ -50,7 +50,9 @@ ATTRIBUTE_ALIGNED16 (struct)	btSolverConstraint
 	
 	int			m_constraintType;
 	int			m_frictionIndex;
-	int			m_unusedPadding[2];
+	void*		m_originalContactPoint;
+	int			m_unusedPadding[1];
+
 
 	enum		btSolverConstraintType
 	{