Bring OSS Zipkin into internal repo

RB_ID=311737
initial pants integration for zipkin

RB_ID=312811
move all zipkin servers to pants

RB_ID=314101
move analytics projects to pants

RB_ID=315945
fix development of web

RB_ID=314831
Pants build for collector; fixed pants goal list.

RB_ID=317107
fix static content caching

RB_ID=319905
zipkin: Scripts to build and deploy with jenkins.

Scripts for cassie and MH collectors, web, query, scribe-proxy.

RB_ID=318857
zipkin: Fix service discrovery in zipkin-scribe-proxy.

RB_ID=322031
Keep the order of durations in SpanStore.getTracesDuration.
Merge pull request #367 from nshkrob/fix-duration-order

Keep the order of durations in SpanStore.getTracesDuration.
zipkin: Fix tests.

(This CR includes https://github.com/twitter/zipkin/pull/367)

RB_ID=324829
zipkin: Switch query to Manhattan storage

RB_ID=326705
zipkin: Translate Manhattan failures into Future.exceptions.

RB_ID=330239
 zipkin: memcache store and new query API for realtime read path
 This is for zipkin-realtime read path. It includes two main components.
 - memcacheRealtimeAggregatesStore
 - query side API for the realtime aggregates.

RB_ID=329605
Fix zipkin-web's timezone problem

Zipkin-web has problem that browser's timezone is not dealt with correctly.
To fix it, "end time" should be passed as timestamp.

Author: @synk
Fixes #370
URL: https://github.com/twitter/zipkin/pull/370
fix query extractor test
zipkin-hbase scans backwards

Since row keys for a particular service start at Long.MAX_VALUE at the epoch and
grow towards 0 as time progresses, starting at 0 and scanning until a reversed
timestamp actually finds traces after the specified date, and not before.

Author: @sethp-jive
Fixes #369
URL: https://github.com/twitter/zipkin/pull/369
Oss sync

This syncs the internal view to the OSS view.

Author: @sprsquish
Fixes #372
URL: https://github.com/twitter/zipkin/pull/372
Fixing tests for zipkin-hbase

The tests were written for the backwards-scanning behavior, and so they needed
updating with the changes in 3691ce2.

Author: @sethp-jive
Fixes #374
URL: https://github.com/twitter/zipkin/pull/374