number collapsing algorithms

This has come up before, but we never did anything about it.

http://forums.zotero.org/discussion/3603/citation-styles-problem-with-page-numbering-format/

I think we probably need a way to set a global option for collapsing
page number ranges. The one I used in my code is the Chicago version,
which I imagine would work for most cases. But I could imagine there
may be others.

Discussed previously here in this thread:

http://sourceforge.net/mailarchive/forum.php?thread_name=8825F3DC-EE02-412C-ABD3-F4ABB9D66B0B%40gmail.com&forum_name=xbiblio-devel

One problem: we don’t really have a way to set a global option.

Any thoughts on dealing with this?

Bruce