twitter/zipkin — pull request #290 by IceCreamYou (2013-08-06 18:57:19+00:00)
Title: Fix the Ruby gem not honoring incoming X-B3 headers

I keep getting an error about "uninitialized constant Trace" when I try to set up an environment that will talk to the gem, but I expect the code itself to work once I figure out how to test it.