Add brief context of move to language-agnostic Jupyter from IPython

Author: willingc

README.md

@@ -9,6 +9,19 @@ computing.
 
 ![Jupyter notebook example](docs/resources/running_code.png "Jupyter notebook example")
 
+## Jupyter notebook -- the language-agnostic evolution of IPython notebook
+Jupyter notebook is the language-agnostic HTML notebook application for
+Project Jupyter. In 2015, Jupyter notebook was released as part of
+The Big Split of the IPython codebase. IPython 3 was the last major monolithic
+release containing both language-agnostic code, such as the *IPython notebook*,
+and language specific code, such as the *IPython kernel for Python*. As
+computing spans many languages, Project Jupyter will continue to develop th
+language-agnostic **Jupyter notebook** in this repo and with the help of the
+community develop language specific kernels which are found in their own
+discrete repos.
+[![The Big Split announcement](https://blog.jupyter.org/2015/04/15/the-big-split/)]
+[![Jupyter Ascending blog post](http://blog.jupyter.org/2015/08/12/first-release-of-jupyter/)]
+
 ## Installation
 Detailed [user installation information](http://jupyter-notebook.readthedocs.org/en/latest)
 can be found on ReadTheDocs.