1.2.2 - Cleaning up rust

Another small update, fixing up some issues in Inventor episode 3.

• Shuffled items around in Inventor 3's generator
• Made Rebar Sword less common
• Changed Rebar Sword's upgrade
• Added Zombie Sword - Sword-like, gains 1 durability after every battle
• Quick Attack now works properly in Inventor 3
• Fixed Crap Sword+ activating on incorrect values