ENH: allow plotting libraries to easily hook into pandas
At PyData I was introduced to this great library that wraps matplotlib called [prettyplotlib](https://github.com/olgabot/prettyplotlib) by @olgabot and it was used to good effect in @twiecki's presentation on PyMC3. 

I want to incorporate this into pandas - it would be a great improvement and a light dep for the library.

@olgabot said she was interested in working on a PR to incorporate it, so going to track from this issue.
