Bug 1079812 — Migrate the average URL per user script.
Bug 1079812 — Migrate redis_usage from bash to node.
Add the script about the impacted users for Bug 1111579
Update redis_usage script output.
@leplatrem review.
Merge pull request #270 from mozilla-services/1079812-script-to-node

Bug 1079812 — Standardazine redis tools to be all Javascript scripts and benefit from the configuration parser.