Stresstests: envvar C_SLEEP can now be used to add tracebacks to sleep calls
Remove python3.4 travis fixups (it's preinstalled now)
Fixes stress test templates and adds SQS template
Merge branch 'master' of github.com:celery/celery
non-string dict keys in django-celery configs

This fix allows celery-flower to not have problems displaying
configurations for projects that still use configurations embedded
in django settings files.  In this instance there are some int
dict keys that are totally unrelated to celery but that are causing
frequent error messages in the celeryd logs.
Adds stats for eventlet pool
Small doc stuff
Merge branch 'master' of github.com:celery/celery
Fix handling of non-string keys in filter_hidden_settings
Updates system configuration
Renames Task.subtask -> .signature (with alias for compat)