add platformer window infrastructure

Platformer/Util/Program.cs

@@ -0,0 +1,20 @@
+using OpenTK.Graphics.OpenGL4;
+
+namespace Platformer.Util
+{
+    public class Program : GlObj
+    {
+        public Program() : base(GL.CreateProgram())
+        {
+        }
+
+        public static Program Link(params Shader[] shaders)
+        {
+            var p = new Program();
+            foreach (var s in shaders)
+                GL.AttachShader(p, s);
+            GL.LinkProgram(p);
+            return p;
+        }
+    }
+}