SphereCoord/TimeCoord/etc.: Handle coordinate utility functions through a type class not a mixin
Evaluation: Clean up how to specify eval file(s) and better document how to specify training data
Evaluation: Allow for unknown correct cell/coord/rank when eval
Evaluation: Implement evaluation on raw-text files
MergeMetadataAndOldCounts: Fix bug introduced when 'must' value restrictions added
Evaluation: Prefer --results-file to --results