Add Binder badge

Author: jonmmease

README.md

@@ -1,6 +1,8 @@
 Work in progress. Stay tuned!
 
 # Jupyter Dash
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/plotly/jupyter-dash/master?urlpath=lab/tree/notebooks/getting_started.ipynb)
+
 This library makes it easy to develop Plotly Dash apps interactively from with Jupyter environments.
 
 See the [notebooks/getting_started.ipynb](https://github.com/plotly/jupyter-dash/blob/master/notebooks/getting_started.ipynb) for more information and example usage.