Make the test pass deterministcally, I hope.
Merge pull request #64 from hybridcluster/intermittent-test-failure-62

Make occasionally failing test pass deterministically, hopefully.

Fixes #62.
Merge remote-tracking branch 'refs/remotes/origin/master' into better-deferred-api-13
Document removal of old Deferred APIs.
Remove deprecated Deferred APIs.
Merge pull request #67 from hybridcluster/better-deferred-api-13

Better Deferred API.

Fixes #13.
Merge remote-tracking branch 'refs/remotes/origin/master' into trial-logs-69
Document new API.