add cost information in margin aggregator and method linked in model (cost, evaluated_price).
add multi catalog price
update scope of_role
update intervention, add cost and split poaceae into cereals and grass
Merge branch 'master' of https://github.com/ekylibre/ekylibre
Merge branch 'master' of https://github.com/ekylibre/ekylibre
change combination chart to stacked chart in elapsed time chart