ipython/ipython — pull request #1700 by jasongrout (2012-05-05 09:00:15+00:00)
Title: A module for sending custom user messages from the kernel.

This provides the user the capability to send custom messages to a custom frontend.

I'm submitting this pull request more to request comment than request a merge at this point---this is my first real patch to IPython and I'm learning about the process and the codebase. For example, one (possibly bikeshedding) issue is what the msg_type for these custom messages should be. This patch has it as `'user'`, but other possibilities include:

* 'extension'
* 'custom'