Made Mathutils use radians rather then degrees. defining USE_MATHUTILS_DEG for testing existing scripts.

Added conversion for BGE Quaternion WXYZ (Blender/C) -> XYZW (Moto C++).
BGE Python API now uses WXYZ following mathutils (break script warning).

source/blender/python/generic/Mathutils.h

@@ -38,6 +38,8 @@
 #include "quat.h"
 #include "euler.h"
 
+/* #define USE_MATHUTILS_DEG - for backwards compat */
+
 /* Can cast different mathutils types to this, use for generic funcs */
 
 typedef struct {