ipython/ipython — pull request #2291 by ellisonbg (2012-08-11 04:04:15+00:00)
Title: Remove old plugin system

When we refatored the core, I added a plugin system. It has turned out that it was not really used because it really is nearly identical to the extension idea. It even horribly confusing (huh, what's the diff between the two?). I have completely removed the plugin system.