Project #4 for Math 155A, winter 2012. Project4 added lighting and normal
Vectors to project3 by using glNormal3f and glLightfv. We also added material
To the objects by calling glMaterialfv, setting intensity for ambient/diffusive/Specular/emissive light.
Also added some spheres towards the top of the rendering window to show
Where the lights are coming from. The user can toggle these using 1,2, or 3
On the keyboard.