Combined Brave REST support with Brave Tracer to show how to get the most out of Zipkin

Hi Kristof,
I forked the example to show how to combine brave REST support and brave tracer.
 In combining brave REST support with brave tracer, one can trace any level within the service itself, as well as tracing any level across service calls, provided that the services themselves as well as frameworking calls those services support brave.
Zipkin has been a great framework and I think this example will show how to unlock the true potential of Zipkin.
Thanks.