… rapid input from barcodes. Oh yeah, Turbolinks is dead.

…ng). Adds .combine! method to the line_items association in Donation, that combines all line_items with the same item_id. There's spec coverage for it too, at both model and feature levels. Barcode entry now works a lot more as you would expect!

…nd transfers as well

…emove if there is an empty line item. This way if they are scanning in things they dont have to make sure to remove the empty created one from the bar code scanner.

… and transfers too.