implement/match CalcLocalTransform (#241)

* implement/match CalcLocalTransform

* fix odd build error

* address feedback

move vec.h to thirdparty folder
update vec.h
move all realtime code to realtime folder
move calclocaltransform out of legoutil and into realtime
cast shift to MxS32
add additional unroll hack to CalcLocalTransform to prevent msvc entropy

LEGO1/mxmatrix.h

@@ -38,6 +38,8 @@ public:
   virtual void ToQuaternion(MxVector4 *p_resultQuat);
   virtual MxResult FUN_10002710(const MxVector3 *p_vec);
 
+  inline float& operator[](size_t idx) { return m_data[idx]; }
+
 private:
   float *m_data;
 };