Renderer: Replace ShaderStage by ShaderModule (a module can handle multiple stages)

include/Nazara/OpenGLRenderer/OpenGLShaderModule.inl

@@ -0,0 +1,16 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - OpenGL Renderer"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/OpenGLRenderer/OpenGLShaderModule.hpp>
+#include <Nazara/OpenGLRenderer/Debug.hpp>
+
+namespace Nz
+{
+	inline const std::vector<GL::Shader>& OpenGLShaderModule::GetShaders() const
+	{
+		return m_shaders;
+	}
+}
+
+#include <Nazara/OpenGLRenderer/DebugOff.hpp>