(real-id) command; forms.h

[slevy]

I've added a (real-id) lisp command; given an object name, it returns
nil if nonexistent (with no error message) or a canonical object name,
currently the object's long name, as a quoted string.  So you can get the
selected object's name with
   (echo (real-id target))
and test whether e.g. the world is the selected object with
   (if  (= (real-id target) (real-id World))  ... )

Oddity: I noticed last night that the installed forms.h file wasn't the one
with Celeste's new color wheel object, so glui.c wouldn't compile.  This is
strange, since it clearly has been compiling fine for a couple of weeks.
Anyway, the new forms.h (taken from the FORMS source tree) is now installed in
/usr/local/include, /u/gcg/ngrap/include, and /u/gcg/ngrap/src/lib/forms,
and all copies of libforms.a are updated as well.