Squashed commit of the following:

commit 7f255572794184d39249ada46fb817c1619d840c
Author: Alexandre Masselot <masselot.alexandre@gene.com>
Date:   Tue Apr 15 14:08:03 2014 -0700

    solved the intricated group/category not showing together

commit cf26d3a8d961bad1fd4e0fdd40a130ffa9334960
Author: Alexandre Masselot <masselot.alexandre@gene.com>
Date:   Tue Apr 15 12:39:58 2014 -0700

    adding groupSet in an unordered way can create the first ones not to be displayed....
0.1.5