Merge branch 'master' of github.com:akka/akka
=cam #3929 updated apache camel dependency to version 2.13.0
Merge branch 'master' of github.com:akka/akka
+con #3937 Start ShardCoordinator again after PersistenceFailure

* Add supervisor level that will start the ShardCoordinator again after
  a configurable backoff duration
* Make the timeout of SharedLeveldbJournal configurable
* Include cause of PersistenceFailure in message of ActorKilledException
=per #3933 Correction of seq number logic for persistent channel

* Problem when using PersistentChannel from Processor
* When the seq numbers of the sending processor and the seq numbers
  of the PersistentChannel was out of sync the PersistentChannel
  did not de-duplicate confirmed deliveres that were resent by
  the processor.
* There is a hand-off in the RequestWriter that confirms the
  Processor seq number, and therefore the seq number of the
  RequestWriter must be used in the ConfirmablePersistent from
  the RequestReader
* More tests, covering this scenario
=doc #3954 Clarify how to use snapshots with Maven
=doc #3924 Doc how to be notified when recovery completed
Merge pull request #2097 from akka/wip-3937-sharding-persistent-failure-patriknw

+con #3937 Start ShardCoordinator again after PersistenceFailure
Merge pull request #2099 from akka/wip-3933-persistent-channel-patriknw

=per #3933 Correction of seq number logic for persistent channel
Merge pull request #2101 from akka/wip-3924-doc-notify-recovery-completed-patriknw

=doc #3924 Doc how to be notified when recovery completed
=sam #3945 Added license file and tutorial to java8 persistence sample
Merge pull request #2108 from akka/wip-3945-missing-license-for-template-master-ban

=sam #3945 Added license file and tutorial to java8 persistence sample
Merge pull request #2093 from RayRoestenburg/ticket3929

=cam #3929 updated apache camel dependency to version 2.13.0
Merge pull request #2102 from jozic/3954-maven-snapshots-docs

=doc #3954 Clarify how to use snapshots with Maven
Merge branch 'master' of github.com:akka/akka
WIP.
Finished first working version.
Rewrote version from scratch to support both osgi and maven syntax.
Added support for Versioned on traits.
Merge with origin.