Merge pull request #8387 from JTGSZ/gangs

Ports gang mode

code/__DEFINES/antagonists.dm

@@ -35,3 +35,8 @@
 
 //Overthrow time to update heads obj
 #define OBJECTIVE_UPDATING_TIME 300
+
+//Gangshit
+#define NOT_DOMINATING			-1
+#define MAX_LEADERS_GANG		3
+#define INITIAL_DOM_ATTEMPTS	3

code/__DEFINES/role_preferences.dm

@@ -33,7 +33,8 @@
 #define ROLE_DRONE                  "drone"
 #define ROLE_DEATHSQUAD             "deathsquad"
 #define ROLE_LAVALAND               "lavaland"
-#define ROLE_INTERNAL_AFFAIRS	"internal affairs agent"
+#define ROLE_INTERNAL_AFFAIRS		"internal affairs agent"
+#define ROLE_GANG					"gangster"
 
 //Missing assignment means it's not a gamemode specific role, IT'S NOT A BUG OR ERROR.
 //The gamemode specific ones are just so the gamemodes can query whether a player is old enough
@@ -58,7 +59,8 @@ GLOBAL_LIST_INIT(special_roles, list(
 	ROLE_SERVANT_OF_RATVAR = /datum/game_mode/clockwork_cult,
 	ROLE_OVERTHROW = /datum/game_mode/overthrow,
 	ROLE_INTERNAL_AFFAIRS = /datum/game_mode/traitor/internal_affairs,
-	ROLE_SENTIENCE
+	ROLE_SENTIENCE,
+	ROLE_GANG = /datum/game_mode/gang
 ))
 
 //Job defines for what happens when you fail to qualify for any job during job selection