New Item (No.9 flaming machete) and tweaks

Okay this is coming along well.

Scrapped the whole "Use one action for all fireswords thing" because it
was being a huge pain, might have been prone to bugs and I realized I
wanted some different values in the action for each item.  So now every
firesword gets its own pair of actions, which seems to work best.

Fireswords have a chance go go out randomly.  The chance if different
for each one, but basically, the higher quality it is, the less chance
it'll flame out on you.  The odds to successfully turn one on are also
related to the fireswords' quality.

Fireswords do 25% more cut damage when turned on.  This probably needs
adjusted, I just figured base damage should see SOME effect for being
active.  Long term, I may switch this with a bonus to pain inflicted,
but from what I understand, pain does little (if anything) to hostiles
yet.

Added a second firesword, the "No. 9" (An homage to a character from the
game Parasite Eve 2).  Based on the regular machete, it's stronger, more
reliable, and harder to build than the shishkebab.

Well here's what I got so far.  Huge thanks to i2amroy, ejseto, and
kevingranade.  Without your cooments and help, this would have gone
nowhere.  Take a look, and tell me what you think!