Second try at configurable backlog thresholds
Merge pull request #776 from Singly/bg-backlog-thresholds-again

Second try at configurable backlog thresholds
Yahoo service

* Self synclet
* Authorization
* Refresh of access token lib
* Proxy
Formatted, Bugfixes, lint fixes.
Merge pull request #770 from kubes/yahoo

Yahoo service
Add per-schedule backlog reporting
Fix typo
Merge pull request #777 from Singly/dss-per-schedule-backlog

Add per-schedule backlog reporting
Unnecessary argument in forEach
Cleanup backlog reporting and scan ALL schedules
Log sdk and sdk version headers to graphite.
Merge pull request #779 from kubes/sdk_logging

Log sdk and sdk version headers to graphite.
Merge branch 'master' into task-kvstore
Revert "Temp hack to help migration of disjoint sets"

This reverts commit f1c2a0118795297ca1ba600ad644c0fc932b22b2.