ipython/ipython — pull request #2490 by minrk (2012-10-14 05:16:15+00:00)
Title: add ZMQInteractiveShell to IPEngineApp class list

so it will appear in default ipengine_config.py, `--help-all`, etc.

as [mentioned](https://github.com/ipython/ipython/issues/2473#issuecomment-9414837) in #2473