/** Loads all GraveYardSigns saved in the Data-Path */
  public void loadAllSigns() {
    File file = new File(plugin.getDataFolder() + File.separator + "gravestones" + File.separator);
    if (!file.exists()) return;

    // File filter for directories
    FileFilter fileFilter =
        new FileFilter() {
          public boolean accept(File file) {
            return file.isFile();
          }
        };

    for (File possibleSign : file.listFiles(fileFilter)) {
      SpawnSign sign = SpawnSign.loadSign(possibleSign.toString());
      if (sign != null) signs.add(sign);
    }

    if (signs.size() != 0) plugin.log("loaded " + signs.size() + " graves");
  }