Release 0.0.2 (castorini#152)

* Release: v0.0.2

Change evaluation methodology (castorini#2)

* Change evaluation methodology

- Make MRR, P@1, and R@3 default
- Add natural language queries and keyword queries
- Add 9 more QD pairs

* Physical sciences topics

* Add temperature questions

* Add more examples

* Implement QA transformer reranker

* Fix dataset typo

* Implement random baseline

* Implement more reranker model types

- Implement question answering reranker
- Implement sequence classification reranker

* Add final dataset examples

* Remove missing IDs from dataset

* Improve cosine similarity matrix provider name

* Add dataset statistics calculation

* Add version to dataset

* Add random MRR calculation

* Fix off-by-one in random MRR computation

* Prepare for release

- Add setuptools script
- Fix circular imports

* Add more detailed README

* Change license to Apache

* Fix classifier name

* Clarify README

Co-authored-by: Nikhil Gupta <niks.gupta09@gmail.com>
Co-authored-by: Edwin Zhang <edwinzhang64@gmail.com>