title: pandas convert date (quarters) to datetime object
body: <p>I have a pandas DataFrame that has a column (Title) that needs to be parsed as a datetime object so I can turn this into a time series.</p>
  
  <pre><code>    Title   Gross Domestic Product: Quarter on Quarter growth: CVM SA %
  224 2009 Q3 0.1
  225 2009 Q4 0.4
  226 2010 Q1 0.5
  </code></pre>
  
  <p>can anyone point out what would be the best approach to this? </p>
  
  <p>my desired output would be </p>
  
  <pre><code>    Title   Gross Domestic Product: Quarter on Quarter growth: CVM SA %
  224 2009-09 0.1
  225 2009-12 0.4
  226 2010-03 0.5
  </code></pre>