- transitive dependency didn't have the right version
- that was causing an incompatibility with Tomcat 6

New dependencies added
Old tables replaced by Datatables using Dandelion-Datatables

- integrated Gordon's comments in the POM
- removed antlr from the POM that we don't need anymore
- changed webjars versions inside headTag.jsp

- migrated to Spring 3.2.1
- added hamcrest to the POM so it can be used with the Spring MVC Test
Framework
- Started migrating a JUnit test to Spring MVC Test Framework (at this
stage, it stills doesn't work. It could be because of a conflict with
ContentNegotiatingViewResolver)

- migrated to bean validation annotations
- merged to one single controller

+ add dedicated section for Tomcat 5.5 and Tomcat 6 LTW setup (so it's clearer)