zipkin: fix span duration stats in zipkin realtime
 - fix bugs in span duration stats
 - add tests for monoid

RB_ID=378081
moved Kafka receiver to ThriftSpan

Signed-off-by: Jeff Smick <jeff@twitter.com>

RB_ID=391305
Updating install info for zipkin web

Signed-off-by: Jeff Smick <jeff@twitter.com>

RB_ID=391323
fix zipkin-example
sync oss
Fix exceptions when a root span doesn't exit
Request Order.None as ordering is done in the UI
use the handle path to scope stats in zipkin-web
Test QueryExtractor against values with slashes
fix ordering bugs

RB_ID=416735
Follow sampling rate setting

Signed-off-by: Jeff Smick <jeff@twitter.com>
Add AUTH support, fixes #383.

Signed-off-by: Jeff Smick <jeff@twitter.com>
Don't change constructor signature, add authPassword after ttl.

Signed-off-by: Jeff Smick <jeff@twitter.com>
Changes as advised.

Signed-off-by: Jeff Smick <jeff@twitter.com>
Update hbase version

Signed-off-by: Jeff Smick <jeff@twitter.com>
Update zookeeper version

Signed-off-by: Jeff Smick <jeff@twitter.com>
Fix HBase test dependency problem

Signed-off-by: Jeff Smick <jeff@twitter.com>
Fix guava dependency

Signed-off-by: Jeff Smick <jeff@twitter.com>
Move the guava-hack files into the directory with the zipkin-hbase tests

Signed-off-by: Jeff Smick <jeff@twitter.com>
Add comment explaining why there is a shim

Signed-off-by: Jeff Smick <jeff@twitter.com>