Upgraded site to Spring Framework 4.1.4 along with upgrading most oth…

…er libraries.

Upgraded site to Spring Framework 4.0.2 along with upgrading most oth…

…er libraries.

Added new contact application with multiple sub-modules as an example.

Added two Spring Data JPA apps, upgraded webapps to use Spring Data J…

…PA, upgraded to Hibernate 4.1.

Updated site to Spring 3.1 and upgraded other libraries, and other mi…

…nor enhancements.