Revert "Merge pull request #12 from voidspace/refresh-rate"

This reverts commit 0f58c7c42bdac68e9635528ce3ebd111b272f3f9, reversing
changes made to 594bf710e5f4f3c723cad0a99f1c218df5d3d655.
Backout replicaset changes causing precise CI problems
Merge pull request #14 from voidspace/backout-replicaset-changes