[abandoned in its current form] Item Salvage update (issue#7508)

EDIT: Semantic change. Decomposition sounds odd in a game with the number of corpses, both undead and dead. Now calling the process "salvage" to distinguish it from "disassemble."

Issues addressed:

* Issue #7508 and the sub issues.
    * Status: This one is pretty much done, except MBR vests and, in my opinion, kevlar in general.
* Issue #7810 as I hope to do a more substantial fix to material component salvage, but I'd like something that works in the short term as an 80% answer.
    * Status: this is done too.

Item salvage is the breakdown of items into atomic in-game raw material units. Wood to skewers, clothes to rags, leather to leather patches, etc.

Goal of this pull request: 

* be able to organize and correct majority of the oddities described in #7508 and referenced issues
* salvage still funelled through the `a`pplying of a knife to cut things
* add more details to item salvage
* identify specific areas of item salvage that are problematic, don't make sense, and either fix them or identify and place in a different issue