Class name typo in the testing documentation

The section Watching ... from Probes references class TestKit where TestProbe should be used.
!act #3670: Removing old IO implementation
!act #3637: Add information about target in AskTimeout
!rem #3712 Update to netty 3.8.0
Merge pull request #1779 from drewhk/wip-3670-remove-old-io-drewhk

!act #3670: Removing old IO implementation
=slf #3788 Update to logback 1.0.13 and slf4j 1.7.5
+rem: Implement Quarantine piercing

 - Added refuseUid support in Akka protocol and EndpointManager
 - The AkkaProtocolTransport interface is now a first-class citizen in remoting and endpoint actors
 - The AkkaProtocolTransport interface is now a first-class citizen in endpoint actors
Merge pull request #1780 from drewhk/wip-3637-friendlier-asktimeout-message-drewhk

!act #3637: Add information about target in AskTimeout
Merge pull request #1868 from decodeideas/master

Class name typo in the testing documentation
=act #3720 Optimze actor creation speed and actor size
Merge pull request #1858 from drewhk/wip-3730-actorselection-friendly-quarantine-drewhk

Implemented Quarantine piercing
Merge pull request #1883 from akka/wip-3720-actor-size-and-speed-regression-master-ban

=act #3720 Optimze actor creation speed and actor size
!per #3761 Reliable channels

- Built-in redelivery mechanism for Channel and PersistentChannel
- redelivery counter on ConfirmablePersistent
- redeliveries out of initial message delivery order
- relative order of redelivered messages is preserved
- configurable redelivery policy (ChannelSettings)
- Major refactorings of channels (and channel tests)
- Throughput load test for PersistentChannel

Todo:

- Paged/throtlled replay (another pull request)
- Resequencer (another pull request)
+act #3609 Include host and port in log source
=act #3725 Make FSMTimingSpec more robust.
!act #3012 Remove deprecated event-handlers
Merge pull request #1871 from akka/wip-3012-remove-eventhandlers-patriknw

!act #3012 Remove deprecated event-handlers
!act #2770 Remove deprecated FSM.timerActive_?

* and a few similar in TypedActor
Merge pull request #1872 from akka/wip-2770-remove-timerActive-patriknw

!act #2770 Remove deprecated FSM.timerActive_?
!act Remove deprecated one args tell in ActorSelection