Move SDK include and source to base

include/NazaraSDK/Sdk.inl

@@ -0,0 +1,16 @@
+// Copyright (C) 2017 Jérôme Leclercq
+// This file is part of the "Nazara Development Kit"
+// For conditions of distribution and use, see copyright notice in Prerequisites.hpp
+
+namespace Ndk
+{
+	/*!
+	* \brief Checks whether the module is initialized
+	* \return true if module is initialized
+	*/
+
+	inline bool Sdk::IsInitialized()
+	{
+		return s_referenceCounter != 0;
+	}
+}