Cold Reactions and Applejack

Adds the ability to make a chemical reaction only occur when at or below
a specified temperature.

Adds new reaction for freezing water into ice
- Must be at or below 270K to turn water to ice

Adds two new reagents/drinks: Applejack and Jack Rose cocktail
-Applejack is obtained by freezing cider at or below 270K
- Applejack is slightly more potent than cider, due to it's alcohol
concentration being higher
- Jack Rose is a new mixed drink that is 4 parts Applejack, 1 part Lemon
Juice

Only Ice and Applejack utilize the cold reactions at this time, but the
functionality is in place for future reactions.
- This should allow coders more flexibility with defining new reactions
that may realistically occur at low temperatures.

Renamed the existing "required_temp" variable for reactions to
"min_temp" to better communicate it's purpose and differentiate it from
the new "max_temp" variable for cold reactions.

code/modules/reagents/newchem/drinks.dm

@@ -1,4 +1,4 @@
-datum/reagent/ginsonic
+/datum/reagent/ginsonic
 	name = "Gin and sonic"
 	id = "ginsonic"
 	description = "GOTTA GET CRUNK FAST BUT LIQUOR TOO SLOW"
@@ -13,7 +13,7 @@ datum/reagent/ginsonic
 	result_amount = 2
 	mix_message = "The drink turns electric blue and starts quivering violently."
 
-datum/reagent/ginsonic/on_mob_life(var/mob/living/M as mob)
+/datum/reagent/ginsonic/on_mob_life(var/mob/living/M as mob)
 	if(!M) M = holder.my_atom
 	if(prob(10))
 		M.reagents.add_reagent("methamphetamine",1.2)
@@ -30,3 +30,34 @@ datum/reagent/ginsonic/on_mob_life(var/mob/living/M as mob)
 				M << "<span class='notice'>Way Past Cool!</span>"
 	..()
 	return
+
+/datum/reagent/ethanol/applejack
+	name = "Applejack"
+	id = "applejack"
+	description = "A highly concentrated alcoholic beverage made by repeatedly freezing cider and removing the ice."
+	color = "#997A00"
+	slur_start = 30
+	brawl_start = 40
+	confused_start = 100
+
+/datum/chemical_reaction/applejack
+	name = "applejack"
+	id = "applejack"
+	result = "applejack"
+	required_reagents = list("cider" = 2)
+	max_temp = 270
+	result_amount = 1
+	mix_message = "The drink darkens as the water freezes, leaving the concentrated cider behind."
+
+/datum/reagent/ethanol/jackrose
+	name = "Jack Rose"
+	id = "jackrose"
+	description = "A classic cocktail that had fallen out of fashion, but never out of taste,"
+	color = "#664300"
+
+/datum/chemical_reaction/jackrose
+	name = "jackrose"
+	id = "jackrose"
+	result = "jackrose"
+	required_reagents = list("applejack" = 4, "lemonjuice" = 1)
+	result_amount = 5