code: public final boolean getBooleanDefault(boolean defaultValue, String attribute, String... path)
      {
          return Boolean.parseBoolean(getNodeStringDefault(String.valueOf(defaultValue), attribute, path));
      }
docs: Get a boolean in the xml tree.
  
  @param defaultValue Value used if node does not exist.
  @param attribute The attribute to get as boolean.
  @param path The node path (child list)
  @return The boolean value.
  @throws LionEngineException If unable to read node.