Provide actionable output for boomerang (for Mondo)

[matentzn]

Chris defined what the Mapping output in boomerang means here:

INCATools/ontology-access-kit#447

Now we need to turn this into actions for our Mondo curators.

For now, lets write down, in this ticket, what you think should be the concrete action in response to each of the three categories, and then document how we can help make this easier (ROBOT template, KGCL, etc).