EcoLab

In TCL_obj, defining an operator<<(ostream,X) is enough to allow one use an
X from TCL, and get back a textual representation of the C++ object.

Unfortunately, it only works when X is in global namespace. If X is defined
in some other namespace, EcoLab will report that operator<< is undefined
for that type.

Lower priority, as we haven't really begun to implement namespaces properly
in EcoLab, and TCL_obj is being redone for 5.x