reciprocity/ggrc-core — pull request #678 by SilasX (2013-12-03 01:52:27+00:00)
Title: Auto-generate slugs on spreadsheet import if they are left blank.

Per [story 60886052](https://www.pivotaltracker.com/story/show/60886052). Only required change in `SlugColumnHandler` to treat blank slug/code was warning instead of error, since slugs are auto-generated on item creation.