Flurs Versions Save

What's Changed

• Disallow to build fature-based recommender from empty vector by @takuti in https://github.com/takuti/flurs/pull/12
• Documentation improvements by @takuti in https://github.com/takuti/flurs/pull/13
• Setup style checkers and their pre-commit hook by @takuti in https://github.com/takuti/flurs/pull/15
• Documentation reorg with flurs.datasets.movielens doc string by @takuti in https://github.com/takuti/flurs/pull/16

Full Changelog: https://github.com/takuti/flurs/compare/0.0.4...0.0.5