Move b3Quickprof.* from Bullet 3.x src folder to btgui/Timing

The Bullet 3.x B3_PROFILE can be customized using b3SetCustomEnterProfileZoneFunc/b3SetCustomLeaveProfileZoneFunc defined in Bullet3Common/b3Logging,
so you can hook Bullet 3.x up to your profiler of choice.
The Demos3/BasicGpuDemo will show the Bullet 3.x timings inside the Bullet 2.x btQuickprof profiler.

Demos3/GpuDemos/rigidbody/BulletDataExtractor.cpp

@@ -19,7 +19,6 @@ extern bool enableExperimentalCpuConcaveCollision;
 
 
 #include "OpenGLWindow/GLInstancingRenderer.h"
-//#include "LinearMath/b3Quickprof.h"
 #include "Bullet3Common/b3Quaternion.h"
 #include "Bullet3Common/b3Matrix3x3.h"
 #include "Bullet3OpenCL/NarrowphaseCollision/b3ConvexUtility.h"

Demos3/GpuDemos/rigidbody/ConcaveScene.cpp

@@ -1,6 +1,5 @@
 #include "ConcaveScene.h"
 #include "GpuRigidBodyDemo.h"
-#include "Bullet3Common/b3Quickprof.h"
 #include "OpenGLWindow/ShapeData.h"
 
 #include "OpenGLWindow/GLInstancingRenderer.h"

Demos3/GpuDemos/rigidbody/GpuCompoundScene.cpp

@@ -1,6 +1,5 @@
 #include "GpuCompoundScene.h"
 #include "GpuRigidBodyDemo.h"
-#include "Bullet3Common/b3Quickprof.h"
 #include "OpenGLWindow/ShapeData.h"
 
 #include "OpenGLWindow/GLInstancingRenderer.h"

Demos3/GpuDemos/rigidbody/GpuConvexScene.cpp

@@ -1,6 +1,5 @@
 #include "GpuConvexScene.h"
 #include "GpuRigidBodyDemo.h"
-#include "Bullet3Common/b3Quickprof.h"
 #include "OpenGLWindow/ShapeData.h"
 
 #include "OpenGLWindow/GLInstancingRenderer.h"

Demos3/GpuDemos/rigidbody/GpuRigidBodyDemo.cpp

@@ -1,5 +1,4 @@
 #include "GpuRigidBodyDemo.h"
-#include "Bullet3Common/b3Quickprof.h"
 #include "OpenGLWindow/ShapeData.h"
 #include "OpenGLWindow/GLInstancingRenderer.h"
 #include "Bullet3Common/b3Quaternion.h"

Demos3/GpuDemos/rigidbody/GpuSphereScene.cpp

@@ -1,6 +1,5 @@
 #include "GpuSphereScene.h"
 #include "GpuRigidBodyDemo.h"
-#include "Bullet3Common/b3Quickprof.h"
 #include "OpenGLWindow/ShapeData.h"
 #include "OpenGLWindow/GLInstancingRenderer.h"
 #include "Bullet3Common/b3Quaternion.h"