add nteract to README (#965)

Author: willingc

README.md

@@ -5,7 +5,6 @@
 [![](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaLang.github.io/IJulia.jl/stable)
 [![](https://img.shields.io/badge/docs-latest-blue.svg)](https://JuliaLang.github.io/IJulia.jl/dev)
 
-
 # IJulia
 
 **IJulia** is a [Julia-language](http://julialang.org/) backend
@@ -14,17 +13,20 @@ environment (also used by [IPython](http://ipython.org/)).  This
 combination allows you to interact with the Julia language using
 Jupyter/IPython's powerful [graphical
 notebook](http://ipython.org/notebook.html), which combines code,
-formatted text, math, and multimedia in a single document.  It
+formatted text, math, and multimedia in a single document.
+IJulia is a Jupyter language kernel and works with a variety of notebook
+user interfaces. In addition to the classic Jupyter Notebook, IJulia
 also works with [JupyterLab](https://jupyterlab.readthedocs.io/en/stable/), a Jupyter-based
 integrated development environment for notebooks and code.
+The [nteract notebook desktop](https://nteract.io/) supports IJulia with
+detailed instructions for its [installation with nteract](https://nteract.io/kernels/julia).
 
 (IJulia notebooks can also be re-used in other Julia code via
 the [NBInclude](https://github.com/stevengj/NBInclude.jl) package.)
 
-
 ## Quick start
 
-Install IJulia from the REPL by pressing `]` to enter pkg mode and entering
+Install IJulia from the Julia REPL by pressing `]` to enter pkg mode and entering:
 
 ```
 add IJulia