#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)
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
 #3080 - Including a timestamp in LogEvent and in the MDC
Merge pull request #1356 from akka/wip-3080-include-timestamp-in-logevent-√

 #3080 - Including a timestamp in LogEvent and in the MDC
SerializationCompatibilitySpec failure on JDK7. See #3288
Merge pull request #1387 from akka/wip-3265-RemoteNodeDeathWatchSpec-patriknw

Timing issue in RemoteNodeDeathWatchSpec, see #3265
Merge pull request #1391 from akka/wip-3288-serializationcompatibilityspec-failed-ban

SerializationCompatibilitySpec failure on JDK7. #3288
Added proper serialization for messages sent via ActorSelection #3271