Add support django 1.5, 1.6 and 1.7
Add support django 1.5, 1.6 and 1.7

williamroot/opps,YACOWS/opps,opps/opps,williamroot/opps,YACOWS/opps,opps/opps,jeanmask/opps,YACOWS/opps,opps/opps,YACOWS/opps,jeanmask/opps,opps/opps,williamroot/opps,williamroot/opps,jeanmask/opps,jeanmask/opps