title: How to write text in jupyter / ipython notebook?
body: <p><a href="http://nbviewer.ipython.org/urls/raw.github.com/temporaer/tutorial_ml_gkbionics/master/2%2520-%2520KMeans.ipynb">Here</a> is an example of IPython notebook in which besides the input and output cells we have a plain text. How can I do the same in my IPython notebook? At the moment I have inly <code>In</code> and <code>Out</code> cells.</p>