Merge pull request #1 from mozkeeler/more_brs

Merge more_brs
Merge pull request #11 from mozkeeler/aggregate

merge Aggregate branch
Merge pull request #15 from mozkeeler/aggregate

Aggregate
Update sunlight.go

Fix usage comment
Merge pull request #17 from mozkeeler/limit-entries

Add limit for entries read, fix #10
Merge branch 'master' of github.com:mozkeeler/sunlight into fix-validperiod