beansource sample usage

Here's how the Beansource works.

It uses the standard transformer templated code, except
we use the BeanSource as the input xml source.

---------------------------------------------------------
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer(myStyleSheetSource);
t.transform(new BeanSource(myJavaBean), myResult);
---------------------------------------------------------

So the style sheet becomes the new 'JSP' file,
and the Java bean is the xml document. What this means
is one Servlet can serve all pages, and we just need
one stylesheet per destination html page, with a simple
mechanism for map to find the correct stylesheet and
Java Bean for each resultant html page.