Comment 19 for bug 1749475

To be a bit more precise about "Why Groups", MassLNC in their initial requirements for this project specified the ability to choose among multiple output formats.

Requirement #3, here:
http://masslnc.org/node/3314

In later conversations they further clarified that they wanted users to be able to drop in additional output formats beyond the two called for in the seed data. Groups are part of the method we used to implement this requirement, for the reasons Mike outlines in comment #15.