Halloween mode

This version brings a couple of bug fixes and new Halloween mode which will unlock on October 28. If you want to try it out earlier, check out the Discord. Here are the changes:

• fixed a bug where icon and text for freezing would show up on the screen when the Rogue uses Glacier special to disguise

• added a popup text when a player gets poisoned

• the challenge room with 4 baby dragons and 4 bushidos no longer shows up in RPG mode

• internal source code cleanup and improvements

• special mod for Halloween. It will be active every year from October 28 until November 1st. There's a secret a way to activate it outside of these dates as well. Check out the Discord or Reddit for details.