Updated regression log for car17v2.0-doc2query
The following change log details commits to regression tests that alter effectiveness and the addition of new regression tests.
This documentation is useful for figuring why results may have changed over time.
+### August 9, 2019
+
++ commit [`1217d47`](https://github.com/castorini/anserini/commit/1217d475c88cc4782ff3056506afc43d71bf31fb) (8/9/2019)
+
+Added new Doc2query regression `car17v2.0-doc2query` to replicate [Nogueira et al. (arXiv 2019)](https://arxiv.org/abs/1904.08375) on the TREC 2017 Complex Answer Retrieval (CAR) section-level passage retrieval task (v2.0).
+
### August 5, 2019
+ commit [`80c5447`](https://github.com/castorini/anserini/commit/80c54479d16fea901e474d31b906344300443c02) (8/5/2019)
