Chem Cleanup

-Adds a confirmation to the Empty Spray Bottle verb so you don't lose all your chems on a misclick.
-Reorganizes all the copy-pasted reagents in Chemistry-Reagents.dm. Cuts out about a THOUSAND lines.
-Sleep toxin is made more subtle. No blurry screen, but you might yawn some. Chloral no longer has an instant KO effect, but your vision will become blurry and you'll be unable to run once injected. It is metabolized faster as well.