collection: Make some of the intersectWith/etc. fns return the right type (not finished)
Geolocate: Clean up file tag creation
Rerank: Set rank score as first default feature type
Rerank: Don't include an intercept term; not useful because not label-specific, would cause singularity error
MLogit: Finish implementation
Reranker/Collection: Function to check whether a list is sorted and assert that ranker output has reverse-sorted scores
Scaladoc: Get working, auto API links to Scala library, fix bugs
Reranker/math: Standardize initial scores to mean 0, stddev 1 to make comparable across instances
Reranker: Add log/exp-initial-score, turn off misc -diff features that cause near-singularity errors
Reranker: Remove non-choice-specific features (not helpful, would cause singularity error)
collection: Finish getting intersectBy(), unionBy() etc. working