wrapped up first version of the FractureDemo

move 'split impulse' / position solver before velocity solver, so that applied impulse is available for fracture
add btSliderConstraint::getAngularPos see http://code.google.com/p/bullet/issues/detail?id=489

Demos/FractureDemo/FractureDemo.h

@@ -66,11 +66,11 @@ class FractureDemo : public PlatformDemoApplication
 	virtual void clientMoveAndDisplay();
 
 	virtual void displayCallback();
-	
-	virtual void keyboardCallback(unsigned char key, int x, int y);
-	
+		
 	virtual void keyboardUpCallback(unsigned char key, int x, int y);
 
+	virtual void	clientResetScene();
+
 	static DemoApplication* Create()
 	{
 		FractureDemo* demo = new FractureDemo;