#104 docs update for db/resource

[David Jencks]

I updated the jdbc-database chapter to use the
org.jboss.pool... classes for 2.4 instead of the
org.opentools.minerva... classes for 2.2.2... maybe
this will make rtfm more appropriate ;-)

I updated the resource chapter (jca) to take account of
there no longer being automatic migration and added two
examples for mysql and postgres contributed by Ignacio
Coloma (icoloma@iverdino.com), Thanks!

Does anyone know how to make the examples show up in a
table of contents type list?

Does anyone know how to make the examples be included
inside a CDATA section from an external file? I'd kind
of like to make the examples downloadable rather than
having to cut and save from the web page...