[Gd-hackers] refman tool ready for check-in

[Dustin Voss]

Okay. The refman tool for GD is ready to go. This is bug #7341; the  
diff is attached to the bug.

In brief, this is a tool to export libraries, modules, and bindings  
as an XML file. Once XMLified, it can be run through a documentation  
generator like the DITA thing or my NaturalDocs thing. Open Dylan  
already has this facility, but there was nothing analogous for  
Gwydion Dylan.

I needed to pull a few things out of compiler-main into a separate  
library. That should be completely transparent to existing code,  
except that a <unit-info>'s unit-name slot is now exported via unit- 
info-name.

I assume y'all'll want to check it out before I check it in. :)

I couldn't figure out how to pull a class's superclass from  
the .lib.du file, nor how to get the real names of a function's  
arguments, but other than that, it works as well as OD's export  
facility.