Polished JavaDoc and TODOs in repositories intro.

Removed XML configuration.
Polished advanced repositories section.

Polished JavaDoc. Added Querydsl setup. Prepare test cases for pagination, Querydsl and custom implementations.
Upgraded to Spring Data JPA 1.3.1.
Upgraded to Jetty 9 plugin.
Added Mockito as dependency.
Polished REST intro.

Updated JavaDoc. Added Spring AOP and AspectJ as dependencies. Upgraded to Jetty 9 Maven plugin. Added Eclipse launch configuration.
Added advanced REST module.