[MERGED PR] Rework vomiting a bit

[RubberRats]

This is a neat change, and I like the idea. Currently, vomiting is just a thing that happens that most people are bothered by, save for the poor janitor that has to clean it up. A few thoughts:

• In the current implementation, it seems like nausea stacks last forever until you vomit. I think it would make more sense for them to decay slowly (as in one every minute or so) over time.
  
• To my knowledge, vomiting was removed from withdrawal effects because it was annoying and not very impactful. Maybe they could be added back with this system.
  
• Barf bags as a station item