🎩 🎸 Class-Based Rank-Based Metrics

[mberr]

Part 7(?) of the #744 destruction train

It also changes the canonical order of metrics from metric_name.side.rank_type.k? to side.rank_type.metric_name.k?

Tasks

• import (rank-based) metric classes from Update rank based evaluator #744
• import tests from Update rank based evaluator #744
• connect classes to RankBasedEvaluator
• Rewrote import of classification metrics
• Add docs (@cthoyt)
• Fix README generation (286fb11)

[cthoyt]

So at this point, this PR now defines all of the ranking metrics through classes but only applies a subset of them this way. To finish the job, this PR will have to get quite a bit more complicated. What do you think @mberr? I'm not sure that there are any more meaningful checkpoints between what's already on master and what it will take to finish the job, so maybe we might want to just bite the bullet and rewrite the evaluator's part that handles these

[mberr]

So at this point, this PR now defines all of the ranking metrics through classes but only applies a subset of them this way. To finish the job, this PR will have to get quite a bit more complicated. What do you think @mberr? I'm not sure that there are any more meaningful checkpoints between what's already on master and what it will take to finish the job, so maybe we might want to just bite the bullet and rewrite the evaluator's part that handles these

agreed, let's do this in one PR.