[resteasy-dev] Updated Resteasy web page

I added an announcement on http://resteasy.jboss.org/ for release 3.0.18.Final. The announcement, and also http://resteasy.jboss.org/docs, has a link to Upgrading from Resteasy 2 to Resteasy 3. -- My company's smarter than your company (unless you work for Red Hat)