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
Merge pull request #1166 from akka/wip-2765-composeableactor-rich

Make ComposableActor example work. Fixes #2765
Only log log initializaton errors directly to StandardOutLogger. See #3069
Merge pull request #1171 from akka/wip-2764-doc-correct-wording-about-actorfor-master-ban

DOC: Correct wording about actorFor. See #2764
Akka SBT plugin now uses project IDs instead of names. See #2695
Merge pull request #1173 from akka/wip-2965-show-how-to-stop-stdout-logging-master-ban

Add new log level OFF. See #2965
Add test for config of multiple loggers, see #2968
(cherry picked from commit 14d857a593513d932b82ab2fd4e2a2dc78ef911c)

Conflicts:

	akka-actor-tests/src/test/scala/akka/event/LoggerSpec.scala