add binder link to README

Author: minrk

README.md

@@ -1,20 +1,22 @@
 # IPython in depth tutorial
 
+Try it out on Binder! [![Binder](https://mybinder.org/badge.svg)](https://mybinder.org/v2/gh/ipython/ipython-in-depth/master?filepath=binder%2FIndex.ipynb)
+
 In its current form, this tutorial is meant to be executed with Jupyter notebook
 5.0, using IPython 6.0 or newer on Python 3, the latest IPython version
 compatible with Python 2 is IPython 5.x that may not have the exact same
-behavior and all the features presented in this tutorial. 
+behavior and all the features presented in this tutorial.
 
 
 You can find our installation instructions [for
-IPython](http://ipython.org/install.html) and [Jupyter
-notebook](http://jupyter.readthedocs.io/en/latest/install.html)
+IPython](https://ipython.org/install.html) and [Jupyter
+notebook](https://jupyter.readthedocs.io/en/latest/install.html)
 
 To get the tutorial, checkout the `ipython-in-depth` repo:
 
     git clone https://github.com/ipython/ipython-in-depth
 
-Or just [download current
+Or [download current
 master](https://github.com/ipython/ipython-in-depth/zipball/master) and unzip
 it.
 
@@ -35,7 +37,7 @@ Change directory inside the directory newly created:
 
     cd ipython-in-depth
 
-You can then start the IPython notebook server at a terminal with:
+You can then start the Jupyter notebook server at a terminal with:
 
     jupyter notebook
 
@@ -50,4 +52,4 @@ time:
   $ docker pull jupyter/data-science-notebook
 
 The image contains a installation of the Jupyter notebook with R, Julia,
-Python2, Python3 and a couple of library for each language.
+Python2, Python3 and a couple of libraries for each language.