Fixed ChordFacts expected to respect sets
Update dictionaries due to introduction of mode
Added check from tombstone in LatestStructReducer
Add custom minus days/months/years to DateTimeUtils
Merge pull request #379 from ambiata/topic/datetimeutils-minus-days

Add custom minus days/months/years to DateTimeUtils
Upgrade poacher, saws and notion to remove test dependencies from jar
Add min and max reducers, composable interval expressions.
Merge pull request #382 from ambiata/topic/less-dumb-interval

Composable interval and min/max reducers
Added snapshot with V0 to data-regression
Added another ingest with V0
Minor adjustments
Spec to check that incrementals get used
Tidying up incremental snapshotspec