Modify some examples
Remove shadowsig, problem only solved by celery.contrib.sphinx anyway. Closes #1865.
fix typo
Wording
Use numbers module
Merge pull request #1868 from outself/patch-1

fix typo
Redis backend chord optimization: Avoid save group at apply and pipeline + O(1) join.

This change is backward incompatible and so is not enabled by default.

To enable this optimization you have to set the `new_join` option
and it must be enabled by all clients and workers part of the chord::

    redis://?new_join=1
Merge branch 'master' of github.com:celery/celery
Added a small cache template for stress test so I don't piss of the OOM killer :)
Add an execv template for stress tests.
Tests should not create files
[Py3] Tests passing
Fix `UnicodeEncodeError` exception when `celery` is managed by `supervisord`
Merge pull request #1872 from codeb2cc/encode-error-with-supervisor

Fix `UnicodeEncodeError` exception when managed by `supervisord`
Removes left over print statements
MAX_CACHED_RESULTS decreased to 100
Trying to debug hanging test case
uh, debugging wrong test case
More test debugging
Signals: Sender argument must account for Proxy/PromiseProxy.  Issue #1873