tree code

[Hans Ronne]

>'Tree code' for civ game.
>I'd welcome any comments on this..

Works fine, but I get this error whenever I click within the tree:

Error: Wrong # args: should be "lindex list index"

This error comes from within the BWidget tree code. I remember this problem
from the last version of your tree code. I think you fixed it then by a
hack to BWidget that probably is absent from the checked in version of
BWidget.

Hans