Added function to get delta time

Now in local physics API

Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp

@@ -117,6 +117,11 @@ void API_Impl::SetSubscription( API::EventAction_Destruction functionPointer )
 	}
 }
 
+float API_Impl::GetFrameTimeLength() const
+{
+	return this->updateFrameLength;
+}
+
 void API_Impl::Update()
 { /** @todo TODO: Update is a temporary solution .*/
 	

Code/GamePhysics/Implementation/PhysicsAPI_Impl.h

@@ -20,6 +20,8 @@ namespace Oyster
 			void SetGravityConstant( float g );
 			void SetSubscription( EventAction_Destruction functionPointer );
 
+			float GetFrameTimeLength() const;
+
 			void Update();
 
 			bool IsInLimbo( const ICustomBody* objRef );