title: How to center col-md-3.5 in the middle?
body: <p>Is it possible to center col-md-3.5 in bootstrap? 
  I know there is no half in the grid system. But I know we can do a col-7 then col-6 and col-6. That will create a col-3.5. 
  So is it possible to have a col-3.5 in the middle using the grid system? </p>
  
  <p>Thanks in advance </p>