[BUG] Fix results_iter when API returns an object CAT-213

[rhiannon-eldridge-lrn]

Fixes #34

Checklist

• [ ] Feature

• [X] Bug

• [ ] Security

• [ ] Documentation

• [X] ChangeLog.md updated

• [X] Tests added

• [X] All testsuites passed

• [x] make dist completed successfully

[shtrom]

We'll have to remember to remove the iteritems boilerplate when we deprecate Python2.