title: Add no. of days in a date to get next date(excluding weekends)
body: <p>I have an date, i need to add no. of days to get future date but weekends should be excluded.
  i.e  </p>
  
  <pre><code>input date = "9-DEC-2011";
  No. of days to add  = '13';
  
  next date should be "28-Dec-2011"
  </code></pre>
  
  <p>Here weekends(sat/sun) are not counted. </p>