readme upgrade

Author: nicolaskruchten

README.md

@@ -1,7 +1,11 @@
 # Plotly Express
 
-This is alpha-quality software, under active development and available for demonstration purposes only!
+Plotly Express is a terse, consistent, high-level wrapper around [Plotly.py](https://plot.ly/python) for rapid data exploration and figure generation.
 
-[![nbviewer badge](https://img.shields.io/badge/render-nbviewer-orange.svg)](https://nbviewer.jupyter.org/github/plotly/plotly_express/blob/master/gallery.ipynb)
+Documentation and examples can be found at https://plotly.github.io/plotly_express
 
-[![binder badge](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/plotly/plotly_express/master?filepath=gallery.ipynb)
+## Installation
+
+Just running `pip install plotly_express` in your terminal!
+
+Plotly Express is compatible with Python 3+ and Python 2.7.