improve tol::forallchild arguments

[Jorge]

tol::forallchild is command that apply a procedure to every children of a Set. The procedure is a Tcl command with prototype

proc iter_fun { args } { ... }

where args expand to the information associated to every member of the Set iterated.

This approach makes impossible to pass any external value to iter_fun and global variable should be used instead.

In order to improve code legibility iter_fun argument should be changed to a script value:

tol::forallchild "iter_fun $arg1 $arg2"

this change should mantain backward compatibility in toltcl in order to facilitate the transition.

[Jorge]

(In [3376]) refs #704, class info is shown inside a widget with syntax syntax highlight

[Jorge]

Replying to josp:

(In [3376]) refs #704, class info is shown inside a widget with syntax syntax highlight

this comment if for ticket #740

[Jorge]

It has being implemented the command tol::foreach with a similar syntax as foreach in tcl.