Change the way of geometries transferring

Receive and display node geometry separately.
Also receive normals of triangles, counts and colors in addition to vertices
Your `updateValue` method (currently on `Workspace` - although I'd like you to move it to `Node`) is essentially `onEvalComplete`.  I'd recommend when you unify these two methods.  a and b are meaningful parameters in other types (and in master), but not in this one.