added readInv()

src/main/java/org/bitbiome/commands/InventoryCommand.java

@@ -7,6 +7,9 @@ import java.util.Scanner;
 public class InventoryCommand implements CommandAPI{
     @Override
     public void performCommand(Scanner scanner, boolean isRunning, String message, TravelEngine travelEngine) {
-
+        
+    }
+    public String readInv(TravelEngine travelEngine){
+        return "";
     }
 }