Use case #2 isn't quite right (Documentation)

[wd5gnr]

In the README.TXT file, I mention that you can remove layers. That's not exactly right. You can do two things: you can stop a model early, or you can replace a model. Because gblend doesn't mess with your coordinates,if you tried to chop out a few slices when you resumed your printhead would wind up printing on air! Need to fix the README next time.