Ndk/Physics: Added first physics components/systems

Former-commit-id: 654b7a2a4645487d139474dcbd02c0882d7c8f02

SDK/include/NDK/Systems/PhysicsSystem.inl

@@ -0,0 +1,16 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Development Kit"
+// For conditions of distribution and use, see copyright notice in Prerequesites.hpp
+
+namespace Ndk
+{
+	inline NzPhysWorld& PhysicsSystem::GetWorld()
+	{
+		return m_world;
+	}
+
+	inline const NzPhysWorld& PhysicsSystem::GetWorld() const
+	{
+		return m_world;
+	}
+}