tiny formatting fix
add debug logging
fix and update sampler
provide a more descriptive name for the ItemQueue pool
on the trace summary show the percentage of the trace taken up by the selected service
name the ZK FuturePool
QueueFull already has a stat. no need to log the error
timeout queue processing actions to avoid workers getting stuck
fix minor borked test

RB_ID=451637
include source exceptions in logs on ephemeral node state changes

RB_ID=466755
reregister on various connection failures/exceptions

RB_ID=476399
java.util.concurrent.TimeoutException, not com.twitter.util.TimeoutException

RB_ID=490847
Move Zipkin into the Birdcage
Convert specs to tests

RB_ID=508585
fix deprecation messages for 2.10

RB_ID=509871
Allow for rich Spans

* Changed common.Span to be a trait so we can extend it and modify its behavior.
* Made it possible to inject a different Handler into the web factory
* Updated UI to primarily show the best effort serviceName.
  * Added the full list of serviceNames to the span info pane
* Changed renderTrace in Handlers to take common.TraceCombo so we can override and modify

RB_ID=508773
properly display the server/client address in annotations

RB_ID=515693
remove deprecated code

RB_ID=522851
Create expiring, efficient in memory store for Z1

RB_ID=529827
3rdparty/BUILD: split up into package dirs - part 4

RB_ID=536335
TBR=true