Fixed warnings in Bullet/src core library

Thanks Martijn Reuvers from Two Tribes B.V. (www.twotribes.com) for the patch

To make this work more visible, suppress warnings in external libraries in Extras (COLLADA_DOM, libxml and glui contain many warnings)
Added PreprocessorDefinitions: _CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE to vcproj files

src/LinearMath/btHashMap.h

@@ -298,4 +298,4 @@ class btHashMap
 
 };
 
-#endif //BT_HASH_MAP_H
+#endif //BT_HASH_MAP_H