title: Trying to install readability python API and I can not import it
body: <p>After installing the package, I enter the python environment. I am new to python so I import the modules that I need however, this one fails to import. Can someone help me fix it.</p>
  
  <pre><code>&gt;&gt;&gt; import readability
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "/usr/local/lib/python2.7/dist-packages/readability/__init__.py", line 1, in &lt;module&gt;
      from .readability import Document
    File "/usr/local/lib/python2.7/dist-packages/readability/readability.py", line 2, in &lt;module&gt;
      from cleaners import html_cleaner, clean_attributes
    File "/usr/local/lib/python2.7/dist-packages/readability/cleaners.py", line 3, in &lt;module&gt;
      from lxml.html.clean import Cleaner
  ImportError: No module named lxml.html.clean
  </code></pre>
  
  <p>I really need this module to work. I am under the impression that this is the same module used 
  <a href="http://www.readability.com/" rel="nofollow">http://www.readability.com/</a>
  and in apples safari <code>read</code> protocol.</p>