add support for double precision and 64bit serialization (and compatibility between all versions)

fix some issue in serialization of nested array data
add some tesing files

Extras/Serialize/BulletFileLoader/autogenerated/bullet_btStridingMeshInterfaceData.h

@@ -23,7 +23,7 @@
 
 // -------------------------------------------------- //
 #include "bullet_Common.h"
-#include "bullet_btVector3Data.h"
+#include "bullet_btVector3FloatData.h"
 
 namespace Bullet {
 
@@ -33,8 +33,8 @@ namespace Bullet {
     {
     public:
         btMeshPartData *m_meshPartsPtr;
+        btVector3FloatData m_scaling;
         int m_numMeshParts;
-        btVector3Data m_scaling;
         char m_padding[4];
     };
 }