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/reagent_containers/food/drinks/drinkingglass.dm

@@ -556,6 +556,14 @@
 					icon_state = "rewriter"
 					name = "Rewriter"
 					desc = "The secert of the sanctuary of the Libarian..."
+				if("applejack")
+					icon_state = "cognacglass"
+					name = "Glass of applejack"
+					desc = "When cider isn't strong enough, you gotta jack it."
+				if("jackrose")
+					icon_state = "patronglass"
+					name = "Jack Rose"
+					desc = "Drinking this makes you feel like you belong in a luxury hotel bar during the 1920s."
 				else
 					icon_state ="glass_brown"
 					name = "Glass of ..what?"