[Nasal-cvs] gtk.nas xml.nas

[Andy Ross]

Update of /home/nasal-cvs/nasal/lib
In directory purr:/tmp/cvs-serv7975/lib

Modified Files:
	gtk.nas xml.nas 
Log Message:
In nasal.h, add a "pure" attribute when compiling under GCC.  That
allows the compiler to better optimize pervasive calls to the naIs*()
predicates, etc...

Add GtkDialog facilities (the vbox and action_area members, and a
dialog_run() method) and a "msgdialog.nas" example.

Misc cleanup of the gtk code to unify it with the rest of Nasal, and
in some cases to shrink it considerably (net -30 lines of code).
Hopefully I didn't break anything.