=doc #3886 improved example of PartialFunction.orElse composition

Changed orElse composition example to better highlight it's
possibilities. This is a follow up PR based on a discussion on
akka-user: https://groups.google.com/forum/#!topic/akka-user/vVUZPMeJmzw
+cam #3885 Add the ability to use an external camel context
=doc #3897 Routers migration guide format fix
The correct directive name is Stop, not Terminate

Make documentation consistent with values from `akka.actor.SupervisorStrategy.Directive`
=doc #3883 Eventsourced to Akka Persistence comparison/migration
Merge pull request #2034 from krasserm/wip-3883-eventsourced-migration-guide-krasserm

=doc #3883 Eventsourced to Akka Persistence comparison/migration
Merge pull request #2023 from ktoso/doc-3886-partialfunc-orelse-ktoso

=doc #3886 improved example of PartialFunction.orElse composition
=doc document why Deliver takes an ActorPath
=per #3898 Increase expect timeout for SharedLeveldbJournalSpec
Merge pull request #2039 from nurkiewicz/patch-1

The correct directive name is Stop, not Terminate
=rem #3787: Fix wrong loglevels in remote events logging (forward port)
!act,doc #3831 Adding more Java with Lambda documentation and support

* The Java with Lambda support documentation for AbstractActor and AbstractFSM are now on par with Scala
* Many small fixes and additions of missing things
* Added an AbstractActorContext that has convenience functions for getChild and getChildren
Merge pull request #2051 from akka/wip-3831-java-8-doc-ban

!act,doc #3831 Adding more Java with Lambda documentation and support
+act #3900 make systemActorOf available to Extensions
=rem #3902: Reduce disassociate errors in remote stress-test
=pro #3904 do not leak internal repositories during staging
=pro Fixed release script Java version check
Merge pull request #2055 from akka/wip-fix-java-version-in-release-script-master-ban

 =pro Fixed release script Java version check
Merge pull request #2052 from akka/wip-3900-systemActorOf-∂π

+act #3900 make systemActorOf available to Extensions
Merge pull request #2045 from akka/wip-pomIncludeRepositories-∂π

=pro #3904 do not leak internal repositories during staging