Merge pull request vinta#1330 from JarnoRFB/master

Replace ggpy with plotnine

Author: vinta

README.md

@@ -341,7 +341,7 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 * [bqplot](https://github.com/bloomberg/bqplot) - Interactive Plotting Library for the Jupyter Notebook
 * [Dash](https://plot.ly/products/dash/) - Built on top of Flask, React and Plotly aimed at analytical web applications.
     * [awesome-dash](https://github.com/Acrotrend/awesome-dash)
-* [ggplot](https://github.com/yhat/ggpy) - Same API as ggplot2 for R.
+* [plotnine](https://github.com/has2k1/plotnine) - A grammar of graphics for Python based on ggplot2.
 * [Matplotlib](http://matplotlib.org/) - A Python 2D plotting library.
 * [Pygal](http://www.pygal.org/en/latest/) - A Python SVG Charts Creator.
 * [PyGraphviz](https://pypi.org/project/pygraphviz/) - Python interface to [Graphviz](http://www.graphviz.org/).