Refactors to delete copypaste and avoid magic numbers.
Replaces tofu-turkey snack with a donut.
Adds several new reagents, including ice (enables iced tea & coffee,
which have the same stats as normal versions), cream (enables doctor's
delight, a -1 tox/sec fruit drink), cola & soda (enables brown star, a
fruit drink, as well as plain old cola/sodawater), and basic alcohol
reagents tequila/vodka/whiskey (which enable tequilla sunrise,
margarita, bloody mary, screwdriver, 'syndicate bomb', whiskey cola,
whiskey soda).
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