title: 'bz2 is module not available' when installing Pandas with pip in python virtual environment
body: <p>I am going through this post <a href="http://blog.adamdklein.com/?p=416" rel="noreferrer" title="Numpy, Scipy, and Pandas - Oh My!">Numpy, Scipy, and Pandas - Oh My!</a>, installing some python packages, but got stuck at the line for installing Pandas:</p>
  
  <pre><code>pip install -e git+https://github.com/pydata/pandas#egg=pandas
  </code></pre>
  
  <p>I changed 'wesm' to 'pydata' for the latest version, and the only other difference to the post is that I'm using pythonbrew.  </p>
  
  <p>I found <a href="https://stackoverflow.com/questions/13915137/how-do-you-assign-bz2-to-an-altinstall-of-python">this post</a>, related to the error, but where is the Makefile for bz2 mentioned in the answer?  Is there another way to resolve this problem?</p>
  
  <p>Any help would be much appreciated.  Thanks.</p>