add re-usable createGraphicsSphere method in GpuDemo.

introduce and use maxContactCapacity (needs to be fixed in various other contact kernels)
implement sphere versus trimesh
disable new/sequential GPU batching (only uses 1 thread in a warp, slow but works on NVIDIA/Apple OpenCL)

demo/gpudemo/rigidbody/ConcaveScene.h

@@ -22,6 +22,34 @@ public:
 
 	virtual void setupScene(const ConstructionInfo& ci);
 
+	virtual void createDynamicObjects(const ConstructionInfo& ci);
+
+	virtual void createConcaveMesh(const ConstructionInfo& ci);
+
+	
+};
+
+class ConcaveCompoundScene : public ConcaveScene
+{
+public:
+
+	ConcaveCompoundScene(){}
+	virtual ~ConcaveCompoundScene(){}
+	virtual const char* getName()
+	{
+		return "GRBConcaveCompound";
+	}
+
+	static GpuDemo* MyCreateFunc()
+	{
+		GpuDemo* demo = new ConcaveCompoundScene;
+		return demo;
+	}
+
+	virtual void setupScene(const ConstructionInfo& ci);
+
+	virtual void createDynamicObjects(const ConstructionInfo& ci);
+
 };
 
 #endif //CONCAVE_SCENE_H