Lock down redis-namespace.

Uh oh. :'(
Fix link to fork docs in contributing.md
Merge pull request #995 from raphweiner/contributing_typo

Fix link to fork docs in contributing.md [ci skip]
Verifying the second queue was added to the queues collection
Merge pull request #996 from adomokos/verifying_both_queues

Verifying the second queue was added to the queues collection
Merge remote-tracking branch 'upstream/master'