yangck/celery @ 9f578224b66f86aaa960d5e9ecc55e1cf744a1db

Ask Solem 250631f5c5 Renames celery.task.trace -> celery.app.trace. Closes #1446		12 lat temu
..
__init__.py	9dd6f37029 Rename references to taskset in docs	12 lat temu
base.py	5bc6e57c83 Merge branch '3.0'	12 lat temu
http.py	d965c36966 Py3 fixes	12 lat temu
sets.py	5bc6e57c83 Merge branch '3.0'	12 lat temu
trace.py	250631f5c5 Renames celery.task.trace -> celery.app.trace. Closes #1446	12 lat temu