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

Extras/glui/glui_internal.h

@@ -4,6 +4,8 @@
 #include <cstdio>
 #include <cmath>
 
+
+
 #ifndef AND
 #define AND &&
 #define OR  ||