Revert "Revert "Revert "Revert "Added librato sink""""

This reverts commit 9c866d5ac770956d045db35f7f1e2ae837440bfa.
Revert "Revert "Revert "Revert "Revert "Added librato sink"""""

This reverts commit 4e30a05c7ab0da64e4a4d4c939fa5273c577fa24.