Updated plugin dependencies in booking-mvc example.

- Compiler plugin 2.3.2 -> 3.0
- Tomcat plugin 2.0-SNAPSHOT -> 2.1
- Surefire plugin 2.12 -> 2.14
Upgraded dependency versions.

- Spring 3.2.1 -> 3.2.2
- Slf4j 1.6.1 -> 1.7.5
- Log4j 1.2.15 -> 1.2.16 (allows getting rid of exclusions)
- HSQLDB 1.8.0.10 -> 2.2.9
- Hibernate 3.5.0 -> 4.2.0
- JodaTime 1.6 -> 2.2
- JodaTime JPS Tags 1.0.2 -> 1.1.1
- Easymock 2.5.2 -> 3.1
- JUnit 3.8.2 -> 4.11
Added current Jetty plugin to enable mvn jetty:run.
Polished dependency declaration.

Explicitly declare spring-sop to avoid unnecessary exclusions. Excluded Commons Logging explicitly to make sure the Slf4j bridge kicks in.
Merge pull request #12 from olivergierke/uptodateify

* olivergierke-uptodateify:
  Polished dependency declaration.
  Added current Jetty plugin to enable mvn jetty:run.
  Upgraded dependency versions.
  Updated plugin dependencies in booking-mvc example.