updating celery and surrounding libs to latest
upgrading celery related fixes for submodules for celery 3.x upgrade
Merge branch 'master' into celery-upgrade
setting pool to be gevent for celery job, as well as changing stopwaitsecs to 1 minute instead of 10
Merge branch 'master' of github.com:dimagi/commcare-hq
Merge branch 'master' into celery-upgrade

Conflicts:
	submodules/core-hq-src
	submodules/dimagi-utils-src
Merge branch 'master' of github.com:dimagi/commcare-hq
Merge branch 'master' into celery-upgrade

Conflicts:
	submodules/core-hq-src
	submodules/couchexport-src
Merge pull request #135 from dimagi/celery-upgrade

Celery upgrade