use modular initing system rather than calling Init() method.

StgSharp.Common/Graphics/OpenGL/ShaderEdit/Shader.cs

@@ -26,6 +26,7 @@
 // -----------------------------------------------------------------------
 // -----------------------------------------------------------------------
 using StgSharp;
+using StgSharp.Graphics;
 using StgSharp.Internal;
 
 using System;

StgSharp.Common/Graphics/OpenGL/ShaderEdit/Uniform.cs

@@ -25,6 +25,7 @@
 //     
 // -----------------------------------------------------------------------
 // -----------------------------------------------------------------------
+using StgSharp.Graphics;
 using StgSharp.Mathematics.Graphic;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;