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/ConvexDecomposition/cd_wavefront.cpp

@@ -37,6 +37,7 @@
 //
 // http://www.amillionpixels.us
 //
+#include "float_math.h"
 
 #include "cd_wavefront.h"