First commit of 2008, Happy New Year!

Add option to compile without btClock and without profiling: comment out USE_BT_CLOCK, and #define BT_NO_PROFILE
Fixed typo/case in #include "LinearMath/btQuickProf.h", in SpuParallelSolver.cpp
Removed unnecessary files from libxml CMakeLists.txt

Demos/CcdPhysicsDemo/CcdPhysicsDemo.cpp

@@ -226,8 +226,8 @@ void CcdPhysicsDemo::clientMoveAndDisplay()
 #endif //USE_KINEMATIC_GROUND
 
 
-	float dt = m_clock.getTimeMicroseconds() * 0.000001f;
-	m_clock.reset();
+	float dt = getDeltaTimeMicroseconds() * 0.000001f;
+	
 //	printf("dt = %f: ",dt);
 	
 	if (m_dynamicsWorld)