Simplified ContentNegoViewResolver config

- Now using namespace, much simpler (11 lines instead of 27)
- Just a minor issue with:
<bean class="org.springframework.web.servlet.view.JstlView">
	<property name="url" value="" />
</bean>
(should investigate later if we can remove “url” attribute
Moving "visit" object to request scope

Previously was in session scope (doesn’t scale as well)
Error control on description was missing

Took that opportunity to use custom tag (14 lines versus 2 lines)
added comment on <mvc:default-servlet-handler />
renamed headTag.jsp -> staticFiles.jsp
Removed 'Help' from menu

We were planning to create a ‘help’ but it never happened