Commerce, Money & Traders

* Added commerce, money, and traders.
* Fixed display of [[n]] calculated values when viewing spells and magic items.
* Add the ability to "rest" a single spell or power using --rest.
* Changed table indexing (e.g. for item variable attribute names) to use table row object-ids, thereby eliminating impact of changing row numbers.
* On a long rest, call commandMaster item conversion to convert character sheet to new table structures.
* Also on a long rest, call commandMaster command --restock to restock trader inventories.
* Added Services list to GM-edit-mi dialog to allow services to be added to traders.
* Updated --change-attr command to have a '=' qualifier to set temporary attribute value to a specific number.
* Created itemSlotData() utility function to replace faulty slotCounts{} object and add qty & weight counts.

Author: DameryDad