matplotlib/matplotlib — pull request #2759 by fariza (2014-01-23 21:04:11+00:00)
Title: MEP22 Navigation toolbar coexistence

This version of the MEP22 implementation https://github.com/matplotlib/matplotlib/wiki/Mep22#implementation has the following differences

* Keeps the NavigationToolbar clases
* Adds a 'navigation' key in `validate_toolbar` to switch between old and new
* makes a separate file for the Tools