title: ipython - disable welcome message
body: <p>Everytime i enter into <code>ipython</code> mode, ipython welcomes me with this message,</p>
  
  <pre><code>WARNING: Attempting to work in a virtualenv. If you encounter 
  problems, please install IPython inside the virtualenv.
  Python 2.7.6 (default, Mar 22 2014, 22:59:56) 
  Type "copyright", "credits" or "license" for more information.
  
  IPython 1.2.1 -- An enhanced Interactive Python.
  ?         -&gt; Introduction and overview of IPython's features.
  %quickref -&gt; Quick reference.
  help      -&gt; Python's own help system.
  object?   -&gt; Details about 'object', use 'object??' for extra details.
  </code></pre>
  
  <p>Greeting people is all good and well but it takes up most of my shell screen and i am made to do <code>clean</code> to remove them. </p>
  
  <p>How can i disable this welcome message via configuration file?</p>