rootpy/rootpy — pull request #466 by ndawe (2013-10-04 11:19:35+00:00)
Title: [MRG] move quantiles and plot_correlation to plotting.contrib

and support weights in plot_correlation:

![correlations](https://f.cloud.github.com/assets/202816/1268722/d83a11de-2ce6-11e3-8092-639f93d2ecc4.png)