Implement some chat colors/messages, coin drops, lobby lifecycle

src/main/java/gg/malloc/defense/commands/JoinGameCommand.java

@@ -49,7 +49,7 @@ public class JoinGameCommand implements TabExecutor {
       }
       m_plugin.addPlayerToArena(arenaName, player);
     } else {
-      sender.sendMessage("Only players may use htis command.");
+      sender.sendMessage("Only players may use this command.");
     }
     return true;
   }

src/main/java/gg/malloc/defense/commands/LeaveGameCommand.java

@@ -26,6 +26,7 @@ public class LeaveGameCommand implements CommandExecutor {
         return true;
       }
       runner.removePlayer(player);
+      m_plugin.returnPlayerToLobby(player);
     } else {
       sender.sendMessage("Only players may use htis command.");
     }