[split]  finagle StatsFilter: Check for WriteException-wrapped backup-request losers

The various pools wrap failures this way. Another thing that should
attain much greater clarity with the coming Failure change.

RB_ID=134980
[split]  Finagle: A few wording fixes in Sphinx doc templates.

RB_ID=134881
[split]  Add client support for proxies that support HTTP CONNECT, such as squid.

Signed-off-by: marius a. eriksen <marius@twitter.com>

RB_ID=135062
[split] finagle-doc: Add a FAQ, add an entry about CancelledRequestExceptions

	http://twitter.github.com/finagle/guide/FAQ.html#what-s-a-cancelledrequestexception

RB_ID=135783
[split] finagle: update sbt, add finagle-exp

RB_ID=135825
[split]  Add BroadcastCounter and BroadcastStat, refactor Broadcast and Rollup Receiver.

RB_ID=134811
[split]  bump util to 6.2.6-SNAPSHOT - bump util to 6.2.6-SNAPSHOT - release 6.2.5 of util - update changelog

RB_ID=136016
[split]  Finagle-Zipkin: tracing improvements: 1) Fix span annotations to log service names even if host ips are not provided. 2) Add a convenience function for wrapping processing loops in applications (such as grailbird) 3) Change endpoint logic to be more agressive in substituting in local ip address

RB_ID=135679
[split]  bump finagle to 6.1.4-SNAPSHOT - bump finagle to 6.1.4-SNAPSHOT - release 6.1.3 of finagle - update changelog

RB_ID=136054
TBR=true
[split]  bump finagle to 6.1.5-SNAPSHOT - bump finagle to 6.1.5-SNAPSHOT - release 6.1.4 of finagle - update changelog

RB_ID=136163
TBR=true
[split]  DefaultClient/Server: Do not add TracingFilter if NullTracer is used

TracingFilter is quite expensive due to local save and there is
no need to add it to either the DefaultClient or DefaultServer stack
if no tracers are specified (equality test against NullTracer).

RB_ID=127672
[split]  Specify DefaultTimer when creating a ChannelFactory

.. so that Netty does not create a new HashedWheelTimer with a
non-daemon thread.

Also upgraded the Netty version of finagle-test because the constructor
that accepts a user provided timer is not available in 3.5.5.Final.

RB_ID=136605
[split]  finagle-thrift: SocketAddress when serving an iface

RB_ID=137190
TBR=true
[split]  release 6.3.0 of util

 - bump util to 6.3.1-SNAPSHOT
 - release 6.3.0 of util
 - bump util minor
 - update changelog
 - csl release: jump to the right dir on large bumps

RB_ID=137918
TBR=true
[split]  release 6.3.0 of finagle

 - bump finagle to 6.3.1-SNAPSHOT
 - release 6.3.0 of finagle
 - bump finagle minor
 - update changelog
 - bump finagle to 6.2.0

RB_ID=137969
TBR=true
[split]  finagle: bump sbt to 2.3.0

- finagle: bump sbt to 2.3.0
- util: bump sbt to 2.3.0

RB_ID=138034
[split]  finagle-mysql: fix improper use of ServiceFactory in Client

RB_ID=136144
[split]  finagle-mysql owners

RB_ID=138169
[split]  finagle-http: add Response(status)

RB_ID=138147
Merge branch 'master' of https://github.com/twitter/finagle