Updates to support jackson 2.1.1

Hi,
I've just updates my fork deps and code to use jackson 2.1.1

The main reason to do this was to enable support for jackson-module-scala_2.10-2.1.3, which allows for better support for scala case classes, by adding the DefaultScalaModule to a JSONConverter objectMapper.

      val converter = new JSONConverter(t, name)
      converter.getObjectMapper.registerModule(DefaultScalaModule)
      DomainBucket.builder(bucket, t)
        .withConverter(converter)
        .build()

Cheers
-teo