NodeMatchers currently provides several #hasNode(...) matchers, but only checking explicit name and node-type, as Strings.

In some cases where the node name doesn't necessarily matter, it would be handy to have a #hasNode(Matcher<Node>) method for evaluating child-nodes, in the similar spirit as #hasProperty(Matcher<Property>).

We can then add similar convenience methods for matching node name, or a node with a child node whose name matches further rules, e.g.:

        assertThat(node, hasNode(hasProperty("property", "value")));
        assertThat(node, hasNode(nodeName(endsWith("nut"))));
        assertThat(node, hasNode(
                Matchers.<Node> allOf(
                        nodeName(endsWith("nut")),
                        hasProperty("property", "value")
                ));