Added a new "var" in the data module to store mapped item results, in order to handle variants

Added a new "var" in the data module to store mapped item results, in order to handle variants
when crafting, such as perfect gems, inscription research, etc.
Added some code for the eventual feature of merchant auto-buy.
Cleaned up some formatting.
Added a bit to remember the normal tradeskill frame's strata and level so that it can be pushed
all the way to the back when Cauldron is open, which will hopefully resolve the "frame loses
focus" issue, and restore it when Cauldron is closed or "suppressed."
Added an option to the slash command so that the user can enable/disable debug logging, for
troubleshooting, with required locale strings.