Upgraded to Jackson 2.3.0.
Upgraded to Jersey 1.18.

The dependency exclusion for com.codahale.metrics:metrics-jersey in
dropwizard-jersey should be removed as soon as the same Jersey version
is being used in Metrics. Otherwise the Maven Enforcer plugin is very
unhappy about it.
Upgraded to Jetty 9.0.7.
Upgraded to JSR305 Annotations for Findbugs 2.0.2.
Upgraded to Java EL implementation 2.2.6
Upgraded to argparse4j 0.4.2.
Upgraded to Apache HttpClient 4.3.1.
Upgraded to tomcat-jdbc 7.0.47.
Upgraded to Hibernate 4.3.0.Final.
Upgraded to H2 database 1.3.174.
Upgraded to HSQLDB 2.3.1.
Upgraded to npn-boot 1.1.6.
Upgraded to Objenesis 2.1.
Upgraded Maven plugins

* maven-enforcer-plugin 1.3.1
* maven-javadoc-plugin 2.9.1
* findbugs-maven-plugin 2.5.3
* maven-shade-plugin 2.2
Upgraded to Hibernate Validator 5.0.2.
Upgraded to Liquibase 3.0.8.
Upgraded to Mustache 0.8.14.
Merge pull request #429 from joschi/dependency-updates

Dependency updates