got a version of gln working
not satisfied however
Reorganized /preadd/gln in anticipation of branching to work on expex-gln.
commit the current state of glbreak (which includes gln) before merging
with the master branch
merge the work on glbreak, and nlevel into the master branch
Merge branch 'glbreak'

Conflicts:
	core/expex-add.tex
	man/0.tex
spaces after [ or / in nlevel should now disappear
Commiting branch nlevelvskips prior to merging it back into branch nlevel
and then deleting it.
Merge branch 'nlevelvskips' into nlevel

Resume work on nlevel
working on diacritic
save in case I need to retreat
further work on integrating add into main expex file
commit to save if things don't go well
Next step will be a major change in the way exceptional items are handled.
When \gla creates \mainlist, each item that \gla processes will be assigned
a type which will be appended to a list \itemtypelist.  As \mainlist is
printed at the end, the item types will be used to control the printing.
\mainlist and \itemtypelist will be paired one for one.

This commit is a retreat point is things don't go well.
Buiulding wrap-style glosses around \itemtypelist seems to be working
well at this point.  Commit it.