removed some deprecations
more deprecation warnings removed
removed some deprecation warnings from akka-contrib
removed deprecation warnings from akka-multi-node-testkit
removed one deprecation warning in akka-osgi
removed deprecation warnings from akka-remote-tests
removed deprecation warnings from akka-remote
removed deprecation warnings from akka-samples
removed some deprecation warnings from akka-testkit
removed deprecation warnings from akka-transactors
removed 1 deprecation warning from akka-zeromq
fixed instamtiation error of InboxActor in actor.dsl.Inbox
 #3205 - Fixing a race condition in TcpConnectionSpec
Timing issue in RemoteNodeDeathWatchSpec, see #3265

* The EndHeartbeatReq was probably not triggered within
  the 3 seconds timeout
Improve wording in 2.2 migration guide (closes #3284)
Count the number of threads during tests to find leaks. See #2936
Added delimiter-byte codec that fixes SslTlsSpec #3256
Merge pull request #1369 from drewhk/wip-3256-line-oriented-pipeline-drewhk

Wip 3256 line oriented pipeline drewhk
Merge pull request #1388 from hseeberger/master

Improve wording in 2.2 migration guide
Merge pull request #1376 from akka/wip-3205-TcpConnectionSpec-race-condition-√

 #3205 - Fixing a race condition in TcpConnectionSpec