Pre-Release #25, Now With Better Almost Everything

This release is kind of huge, so I decided to do a minor version update.

• Internally, made some new item subtypes (including a brand new one for armor), which will help organize everything better
• Gun now takes bullets which are dropped randomly by monsters
• Merchant in metal tunnel now a person instead of an extension of the small_hole item
• Merchants give a LOT more information for better shopping experience
• Pain Quarry now requires a riddle to access initially
• Audio system now modular (can use either synth or samples (future implementation)) and uses "cues" in a new module instead of cluttering up the methods where audio is cued
• River Bridge now has a boss that needs to be defeated to cross it
• Animations can now use color due to me updating matrext
• Certain items can be used in battle
• Special abilities now have descriptions in your character profile
• Many, many bugs fixed

There're more features planned, but this is a pretty huge update for now, so enjoy!