Add magenta line indicating push dates

https://blog.mozilla.org/webdev/2012/04/05/tracking-deployments-in-graphite/
Group graphs by prefix
Merge pull request #15 from diox/improve-api-dashboard

Improve Zamboni API Dashboard (bug 963072)
Add fireplace.api.FeaturedSearchView now that it's separated
Merge pull request #16 from diox/add-fireplace-featuredsearchview

Add fireplace.api.FeaturedSearchView now that it's separated