change mergeAttrs argument order to be more like _.extend()
change mergeAttrs argument order to be more like _.extend()

wjb12/backbone-nested,wjb12/backbone-nested,Jaspersoft/backbone-nested,GerHobbelt/backbone-nested,Mordentware/backbone-nested,Jaspersoft/backbone-nested,Mordentware/backbone-nested,afeld/backbone-nested,afeld/backbone-nested