Remove unused thrift Dictionary from Pivot
Upgrade specs2 and remove SignificantFigures
use the latest specs2 version (2.4.8)
Merge pull request #360 from ambiata/topic/specs2-upgrade-significant-figures

Upgrade specs2 and remove SignificantFigures
Add Chord windowing reducer logic and tests

This isn't currently wired up, and requires squash to be completed first.
Always write out the last fact before each chord entity window (for state-based features)
Merge pull request #359 from ambiata/topic/chord-windowing-part-1

Add Chord windowing reducer logic and tests
Updating notion and poacher versions
Merge pull request #362 from ambiata/topic/mr

Updating notion and poacher versions
Fix the chance of tests being discarded for MR property specs
Ensure ChordEntity name is unique to fix flakey tests
Merge pull request #363 from ambiata/topic/gen-no-discard

Fix the chance of tests being discarded for MR property specs
Fix flakey SquashReducerLookupSpec when reducers was Short.MaxValue
Fix flakey EavtTextImporterPureSpec when name was in the dictionary
Allow large features to span multiple reducers on ingest
Ensure namespaceSizes ignores hidden files