OpenRA/OpenRA — pull request #6362 by atlimit8 (2014-08-29 18:44:56+00:00)
Title: Add WithSellSounds & upgrade to rules

WithSellSounds[.SellSounds] replaces Building.SellSounds but can be applied to non-building actors.
The reason for keeping it separate from Sellable, is that sometimes Building defined SellSounds where Sellable was not present and the SellSounds is used through inheritance.