Traitor Deathmatch (#2719)

* Traitor Deathmatch: Add the preset [Rebase onto factors line]

* Traitor Deathmatch: Being a human head or other not-quite-fully-animate object counts as dead. [ROFL]

* Traitor Deathmatch: Add redemption machine (but it doesn't work) [ROFL]

* Traitor Deathmatch: Map in redemption machines [ROFL]

* Traitor Deathmatch: Make the rounds end properly [ROFL]

* Traitor Deathmatch: PDA redemption works [ROFL]

* Traitor Deathmatch: New redemption machine sprite ( @Tomeno )

* Traitor Deathmatch: Get rid of redundant using

* Traitor Deathmatch: Change scoring, prevent redeeming your own PDA, fix bug where PDAs are not tagged with their owner names

* Traitor Deathmatch: Better messages, change cvar name, don't count ghosts for spawnpoint selection

Content.Shared/CCVars.cs

@@ -102,6 +102,13 @@ namespace Content.Shared
         public static readonly CVarDef<int> TraitorMaxPicks =
             CVarDef.Create("traitor.max_picks", 20);
 
+        /*
+         * TraitorDeathMatch
+         */
+
+        public static readonly CVarDef<int> TraitorDeathMatchStartingBalance =
+            CVarDef.Create("traitordm.starting_balance", 20);
+
         /*
          * Console
          */