Initial commit for course IN310
2011-2012 course

Squashed commit of the following:

commit 03b0a50e9d7ac5990350d8a97b88fc62b0eb152e
Author: Luca De Feo <luca.defeo@polytechnique.edu>
Date:   Fri Jun 27 18:05:31 2014 +0200

    Section titles up one level in main page

etc.
2012-2013 course
2013-2014 course