adds a new StudyRanker class with underlying featurizer+classifier model, that works generically for both citations and fulltexts, in either online or batch training contexts
adds new tasks to train study ranker model in online/batch contexts, depending on inputs; removes old tasks to train citation ranker model
simplifies and extends situations that result in training of the study ranker
applies study ranker model in relevance ranking of studies
adds river dependency, and bumps numpy, used in new model
changes
StudyRankerclass with underlying featurizer+classifier model, that works generically for both citations and fulltexts, in either online or batch training contextsriverdependency, and bumpsnumpy, used in new model