New lesson: Types of scene-objects

Now that we know how to create scene-objects using Blender, we will begin a
serie of lessons about the efetive use of them.

We will use some code and Croquet-Cobalt.

But first we need to define   basic concepts.

Go to:

http://www.opencroquet.org/index.php/Island_Creator/Types_of_scene-objects

and try to understand the difference between the types of scene-objects we will
use.