Report port when IOManager listen fails, see #2852
(cherry picked from commit 9737197c7b2647e861372db1292fb6729e2c7bc8)

Conflicts:

	akka-actor/src/main/scala/akka/actor/IO.scala
Adjust scheduler isCancelled, see #2903

* isCancelled shall return false if the task is expired (run)
  before cancel() is performed
(cherry picked from commit 0c93ca317ef9085c3928e761843aa6d60912741c)

Conflicts:

	akka-actor-tests/src/test/scala/akka/actor/SchedulerSpec.scala
	akka-actor/src/main/scala/akka/actor/Scheduler.scala
Add fail fast checks to prevent null message, see #2800
(cherry picked from commit 5526f9d2a8b01f944ff078ce57f2a03c21649d05)

* Added null check in Envelope.apply
Change more copyright to 2009-2013, see #2879

* Also added some missing headers
Make ComposableActor example work. Fixes #2765
DOC: Correct wording about actorFor. See #2764

Conflicts:
	akka-docs/rst/general/addressing.rst
Add the LogLevel OFF that can be used to turn off logging. See #2965

Conflicts:
	akka-actor/src/main/scala/akka/actor/ActorRefProvider.scala
	akka-docs/rst/java/logging.rst
	akka-docs/rst/scala/logging.rst
Change documentation to consistently use quotes for log levels. See #2965
Ensure that logging propagates since it is asynchronous. See #3069
Change event-handlers to loggers. See #2965
Removed TOC for old IO in the new docs. Reported by rit.
Merge pull request #1175 from drewhk/wip-remove-old-io-toctree-drewhk

Removed TOC for old IO in the new docs. Reported by rit.
Links to akka books, see #2713
(cherry picked from commit cb2e682ed8619aa1cf0960b2e0a283f4d994ec77)
Support restart of first seed node, see #2854

* Try to first join other seed nodes before joining itself
Merge pull request #1136 from akka/wip-2854-restart-seed1-patriknw

Support restart of first seed node, see #2854
Merge pull request #1157 from akka/wip-2800-no-null-msg-master-patriknw

Add fail fast checks to prevent null message, see #2800
Merge pull request #1158 from akka/wip-2852-report-io-bind-port-failure-master-patriknw

Report port when IOManager listen fails, see #2852
Merge pull request #1159 from akka/wip-2903-cancel-scheduled-task-master-patriknw

Adjust scheduler isCancelled, see #2903
Merge pull request #1165 from akka/wip-2879-copyright-patriknw

Change more copyright to 2009-2013, see #2879
Merge pull request #1176 from akka/wip-2713-books-master-patriknw

Links to akka books, see #2713