rename ObsoleteDemos back to Demos

fix some relative path issues for loading assets

Demos/ConcaveDemo/main.cpp

@@ -0,0 +1,19 @@
+
+#include "ConcaveDemo.h"
+#include "GlutStuff.h"
+
+#include "GLDebugDrawer.h"
+#include "btBulletDynamicsCommon.h"
+
+GLDebugDrawer	gDebugDrawer;
+int main(int argc,char** argv)
+{
+
+        ConcaveDemo* concaveDemo = new ConcaveDemo();
+        concaveDemo->initPhysics();
+        concaveDemo->setCameraDistance(30.f);
+		concaveDemo->getDynamicsWorld()->setDebugDrawer(&gDebugDrawer);
+
+        return glutmain(argc, argv,640,480,"Static Concave Mesh Demo",concaveDemo);
+}
+