title: Add phpexcel to my project
body: <p>I need to generate Excel files, I did a search and phpexcel seems to be good and stable. I'd like to know:
  * how to integrate it into my project given that it's a symfony2.0 project
  * if I can do all what I do normally on excel file through this php library (cells colors, adding lists ...)</p>
  
  <p>Thanks,</p>