tg-extract-results: Make it possible to select columns to omit
GridLocate/Ranker: Make partial kl and cos-sim the default, add sum-frequency ranking, sort of fix tf-idf (FIXME: still broken)
Memoizer: Implement LongToIntMemoizer, IntToIntMemoizer
Ranker/Reranker: Split into GridReranker, GridFeatureVector; rename Ranker to GridRanker to avoid name clash with package learning
*: Update copyright notices to 2014, add missing ones