Now depends on kombu 2.5.14
tests passing
Bumps version to 3.0.23 and updates Changelog
Skip unstable test
Update CONTRIBUTORS.txt

add myself to the contributors list
Conflicts:
	CONTRIBUTORS.txt
Adds note about ACCEPT_CONTENT
Hostname should also be passed through safe_str

Conflicts:
	celery/apps/worker.py
Fixes AMQP result backend leak.  Depends on celery/kombu@e506b1f59afd4ecf7f8927b0d84ff41f4961b334
flakes
@task(_force_evaluate=True) should not return proxy
GroupResult.restore should use self.app if possible
Refactors tests to limit use of current_app
Allow + in result backend URLs
Cache backend can now be set by URL (backend="cache+memory://")
Can now set SQLAlchemy backend using url: backend=database+sqlite:///
celery.app.bugreport now supports app argument
More tests
app.add_defaults now supports lazy objects.
Cosmetics
Adds self.app.log.already_setup attribute that is global