Add PhysicsEffects to Extras. The build is only tested on Windows and Android.

The Android/NEON optimized version of Physics Effects is thanks to Graham Rhodes and Anthony Hamilton, See Issue 587

Extras/PhysicsEffects/sample/api_physics_effects/common/common.h

@@ -0,0 +1,31 @@
+/*
+Physics Effects Copyright(C) 2010 Sony Computer Entertainment Inc.
+All rights reserved.
+
+Physics Effects is open software; you can redistribute it and/or
+modify it under the terms of the BSD License.
+
+Physics Effects is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+See the BSD License for more details.
+
+A copy of the BSD License is distributed with
+Physics Effects under the filename: physics_effects_license.txt
+*/
+
+#ifndef __COMMON_H__
+#define __COMMON_H__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+
+// Platform specific
+#ifdef _WIN32
+	#include <windows.h>
+#endif
+
+#endif /* __COMMON_H__ */