- Allow ClusteredBeam minions to cover intervals of more than one segmentBucket.
  This functionality is currently experimental.
- Deprecated ClusteredBeamTuning.create(stuff) in favor of .builder(). 
- Clean up a bunch of logging and comments in ClusteredBeam.
- Remove intervalFromDict, partitionFromDict from the BeamMaker trait.
  I don't think they were actually useful...