title: passing command line argument to python-behave
body: <p>I am using python-behave for BDD testing, I have to pass an URL (e.g. www.abc.com) from command line.</p>
  
  <pre><code>$behave -u "www.abc.com" 
  </code></pre>
  
  <p>To achieve this, I have read <a href="http://pythonhosted.org/behave/behave.html#configuration-files">behave documentation</a> but there are not enough materials as well as explanations given for setting up the behave.ini file. I am also not sure how behave.ini file helps me to pass an argument.</p>
  
  <p>Can someone please tell me how I can setup command line parameters for behave?</p>