Issue #391: Fix flakey Squash partitionEntity
Merge pull request #397 from ambiata/topic/flakey-squash-partition-test

Fix flakey Squash partitionEntity
Only squash when there is more than one output
Switch Dictionary.byFeatureIndexReverse to be keyed by FeatureId
Introduced FeatureId.parse
DictionaryConcrete back to dictionary
Introduced DictionaryConcrete byFeatureIndexReverse
Introduced debug-dump-reduction for great good
fixup! Introduced debug-dump-reduction for great good