#31 - Updated dependencies.

- Spring Boot 1.1.8 -> 1.1.9
- Querydsl 3.4.3 -> 3.5.1
- Spring 4.1.0 -> 4.1.2
- Spring Data Releasetrain Evans GA -> Evans SR1
- Lombok 1.14.6 -> 1.14.8
- Tomcat 8.0.9 -> 8.0.15
#29 - Fixed setup of Spring Boot Maven plugin.

Removed the declaration of the Spring Boot Maven plugin in the root POM as it broke the build for package and install goals for projects that don't actually contain a main class but tests only.

Declared the plugin at the root POM for Spring Data REST related projects as these are the only ones providing a standalone runnable app.

Related pull request: #30.