fill in GLProgram#initialize

runtime/lib/gl_program.rb

@@ -4,5 +4,13 @@ class GLProgram
   # @param shaders [Array<GLShader>] Shaders to attach to the program.
   # @param options [Hash] Optional parameters.
   def initialize(*args)
+    args.each do |arg|
+      if arg.is_a?(GLShader)
+        attach_shader(arg)
+      else
+        raise NotImplementedError.new("Other arguments not yet implemented")
+      end
+    end
+    link
   end
 end