resolve some naming conflicts between Bullet 3.x and Bullet 2.x

add BasicGpuDemo that bridges Bullet 2.x and Bullet 3.x (still preliminary/crashing/instable)

Demos3/BasicDemo/main.cpp

@@ -0,0 +1,39 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2007 Erwin Coumans  http://continuousphysics.com/Bullet/
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "BasicDemo.h"
+#include "GlutStuff.h"
+#include "btBulletDynamicsCommon.h"
+#include "LinearMath/btHashMap.h"
+
+
+	
+int main(int argc,char** argv)
+{
+
+	BasicDemo ccdDemo;
+	ccdDemo.initPhysics();
+
+
+#ifdef CHECK_MEMORY_LEAKS
+	ccdDemo.exitPhysics();
+#else
+	return glutmain(argc, argv,1024,600,"Bullet Physics Demo. http://bulletphysics.org",&ccdDemo);
+#endif
+	
+	//default glut doesn't return from mainloop
+	return 0;
+}
+