+con #3677 Limit delta in DistributedPubSubMediator
!con #3679 Make protobuf serialization for DistributedPubSubMediator
=clu #3683 Don't trigger extra heartbeat when not expected sender
update to latest version of Typesafe CONTRIBUTING rules
=doc #3684 Document that SslTlsSupport doesn't support Tcp.WriteCommand.
Merge pull request #1809 from akka/wip-3684-ssltlssupport-do-not-support-tcp-writecommands-ban

(forward port) =doc #3684 Document that SslTlsSupport doesn't support Tcp.WriteCommand.
Merge pull request #1792 from akka/wip-3677-limit-delta-patriknw

+con #3677 Limit delta in DistributedPubSubMediator
Merge pull request #1812 from akka/wip-3679-protobuf-pubsub-patriknw

!con #3679 Make protobuf serialization for DistributedPubSubMediator
Merge pull request #1799 from akka/wip-3683-extra-heartbeat-patriknw

=clu #3683 Don't trigger extra heartbeat when not expected sender
=doc Fix spelling. Change depreceated to deprecated
Merge pull request #1811 from benmccann/depreceated-spelling

=doc Fix spelling. Change depreceated to derecated
Merge pull request #1803 from akka/wip-CONTRIBUTING-∂π

update to latest version of Typesafe CONTRIBUTING rules
!per #3681 Performance and consistency improvements

- batch-write of persistent messages (user API)
- batch-write of events (in EventsourcedProcessor)
- command processing in EventsourcedProcessor by unstashing messages one-by-one from the internal stash
   * fixes performance issues that come up with unstashAll
- commands are not looped through journal actor but processed directly
- initial performance tests
  * command sourcing
  * event sourcing
  * event sourcing with user stash operations
- suppress stack traces in tests
Merge pull request #1808 from krasserm/wip-3681-performance-improvements-krasserm

!per #3681 Performance and consistency improvements
=doc Update Sphinx installation instructions
=doc,osg Effort to get OSGi integration tests running again

* Update protobuf dependency so mvn clean install runs again
* Bump OSGi version range in AkkaBuild to include current 2.3 for generated manifests
* Update path in dev documentation to correct TexBasic folder
Merge pull request #1817 from sandermak/osgi-sample-improvements

=doc,osg Effort to get OSGi integration tests running again
Merge pull request #1816 from akka/wip-sphinx-patriknw

=doc Update Sphinx installation instructions
=pro #3448 Upgrade to sbt 0.13.0
=all #3448 Newer Scalariform running on more files