private static Element getChild(Element element, String name) {
        Node child = element.getFirstChild();
        while (child != null) {
            if (child.getNodeType() == Node.ELEMENT_NODE && name.equals(child.getNodeName())) {
                return (Element) child;
            }
            child = child.getNextSibling();
        }
        return null;
    }
Provides a default configuration (TikaConfig).  Currently creates a
new instance each time it's called; we may be able to have it
return a shared instance once it is completely immutable.

@return default configuration
tika-core/src/main/java/org/apache/tika/config/TikaConfig.java