Louisville Slaughterer tweak

This PR remove the duplicate Louisville Slaughterer in crafting menu.
The duplicate Louisville Slaughter was due to 2 separate recipes for LS. One uses the bat (and others) while the other uses the burnt out LS (and others) as components.

This PR combine the two by making LS disassemble-able AND adds a hidden (auto-learn: false) burnt out LS that can be disassembled.
The result: One LS in the craft menu now, if you disassemble the LS you will get the bat, gasoline, nomex and rag. Used up LS turns into burnt out LS - if you disassemble that you will only get the bat and nomex.