Check that the stock is enough when adding lines to a sale
Merge branch 'test_labels' into sales_without_stock

Conflicts:
	app/views/sales/new.dryml
	spec/integration/admin_makes_a_sell_spec.rb
Merge remote-tracking branch 'origin/master' into sales_without_stock
Rename test and make sure it passes
Merge pull request #18 from suyccom/sales_without_stock

Check that the stock is enough when adding lines to a sale