Add "dependency not loaded" message

src/main/java/net/frankheijden/serverutils/managers/Result.java

@@ -12,12 +12,25 @@ public enum Result {
     FILE_CHANGED,
     INVALID_DESCRIPTION,
     INVALID_PLUGIN,
+    UNKNOWN_DEPENDENCY,
     ERROR,
     SUCCESS;
 
+    private String arg;
+
+    Result() {
+        this.arg = "";
+    }
+
+    public Result arg(String arg) {
+        this.arg = arg;
+        return this;
+    }
+
     public void sendTo(CommandSender sender, String action, String what) {
         Messenger.sendMessage(sender, "serverutils." + this.name().toLowerCase(),
                 "%action%", action,
-                "%what%", what);
+                "%what%", what,
+                "%arg%", arg);
     }
 }