update css classes for 960gs (all block must be included in a grid_12 or grid_16)
update css classes for 960gs (all block must be included in a grid_12 or grid_16)

git-svn-id: 225014b1468efd39dab7835d5e4ecba4deff9b9e@412 7b2eb738-463f-0410-8820-43b14e3dcc91

tualatrix/django-profile,tualatrix/django-profile