Update readme instructions.

README.rst

@@ -18,28 +18,30 b''
 Overview
 ========
 
-Welcome to IPython.  Our full documentation is available on `our website
-<http://ipython.org/documentation.html>`_; if you downloaded a built source
-distribution the ``docs/source`` directory contains the plaintext version of
-these manuals.  If you have Sphinx installed, you can build them by typing
-``cd docs; make html`` for local browsing.
+Welcome to IPython.  Our full documentation is available on `ipython.readthedocs.io
+<https://ipython.readthedocs.io/en/stable/>`_ and contain information on how to install, use
+contribute to the project.
 
-
-See the `install page <http://ipython.org/install.html>`__ to install IPython.
+Officially, IPython requires Python version 2.7, or 3.3 and above.
+IPython 1.x is the last IPython version to support Python 2.6 and 3.2.
 
 The Notebook, Qt console and a number of other pieces are now parts of *Jupyter*.
 See the `Jupyter installation docs <http://jupyter.readthedocs.io/en/latest/install.html>`__
 if you want to use these.
 
-Officially, IPython requires Python version 2.7, or 3.3 and above.
-IPython 1.x is the last IPython version to support Python 2.6 and 3.2.
 
 
-Instant running
-===============
+
+Developement and Instant runnimg
+================================
+
+You can find the latest version of the development documentation on `readthedocs
+<http://ipython.readthedocs.io/en/latest/>`_. 
 
 You can run IPython from this directory without even installing it system-wide
 by typing at the terminal::
-
+    
    $ python -m IPython
 
+Documentation and installation instructions for older version of IPython can be found on the
+`IPython website <http://ipython.org/documentation.html>`_