[ADD] stock_available: generic module to compute the stock quantity available to promise using several implementations. Make stock_available_immediatly the first configurable implementation
[ADD] stock_available_sale: take sale quotations into account in the stock quantity available to promise
[ADD] stock_available_mrp: take immediate manufaturing capability into account in the stock quantity available to promise
[IMP] Add translation into French and translation templates
Merge remote-tracking branch 'team/7.0-add-stock-available' into 7.0-_prod-conflicts

Conflicts:
	stock_available_immediately/product.py