title: vgl.h missing - OpenGL
body: <p>i've started reading the OpenGL Redbook.
  They're writing we need the "freeglut" lib. Okay, got it so far.</p>
  
  <p>But they include the "vgl.h" and "LoadShaders.h", it's not included in freeglut?
  Where do i find them?</p>