#3343 - Moving to Scala 2.10.2
rework LARS, see #3428

- tasks are still enqueued without reading the clock
- in order to be resilient against timer thread over-sleeping the tasks
  are passed to the timer thread using an AbstractNodeQueue and the
  wheel itself is now private to the timer thread
- reuse queue Nodes along the way to minimize allocation costs

The problem with the old implementation was that the timer thread could
sleep too long, then wake up and run multiple buckets in quick
succession. Tasks enqueued just before that event could then get
executed basically immediately, i.e. before their allotted time.
revert to 10ms and fix two more things, see #3428

- one missing tailrec annotation
- and fix the actual bug: instead of enqueueing relative to the current
  wheel position we must enqueue into that bucket which corresponds to
  the correct time
Merge pull request #1547 from akka/wip-LARS-2.0-∂π

rework LARS, see #3428
Longer timeout in RemoteDeliverySpec. See #3451
Merge pull request #1531 from akka/wip-3343-scala-2.10.2-√

 #3343 - Moving to Scala 2.10.2
add ActorRef.noSender() for the Java API, see #3429

- Actor.noSender is not accessible from Java, but it was in 2.1 so don’t
  remove
- replaced all “null” in doc tests with ActorRef.noSender()
Merge pull request #1529 from akka/wip-3429-ActorRef.noSender-∂π

add ActorRef.noSender() for the Java API, see #3429
Fixes for leaked connection

 - Also introduces reason in the Disassociate message
 - Reliable delivery now transitions from idle to active if there are pending system msgs
 - Minor fix in merging receive buffers (reduces resends)
 - Tweaked WireFormat
 - Removed busy-wait in startup
 - throwing the proper exception type in EndpointReader
 - InvalidAssociationException extends NoStackTrace
Merge pull request #1552 from drewhk/wip-connection-leak-fix-drewhk

Bugfixes aplenty -- connection leak and reliable delivery fixes
Merge pull request #1554 from akka/wip-3451-missing-identify-message-ban

Longer timeout in RemoteDeliverySpec #3451
Merge remote-tracking branch 'upstream/master'