Fussing
Start refactoring files into interfaces
Logs have a ColumnCount
MemLog
Logs have Lines, not AllLogData
Cut
Slicing
Fix statsd files
Remove LogDataSource
Start thinking about summary files
Better handling of unknown value types
go fmt
Disambiguate Log and Summary lines
Timespan interface
MemSummary
Add Columns() to Logs and Summarys
NewFileHeaderFromSummary
Functions return Summaries
gp-aggregate outputs a graphpaper file, not text
Hacky code to get gp-dump to handle summaries