Implement TimeSeriesPrecisionRecall class

[nocotan]

Summary

Implement TimeSeriesPrecisionRecall class.

Goal

Make it enable us to calculate precision and recall simultaneously.

Todo

• TimeSeriesPrecisionRecall class
• ts_precision_recall function
• unit test of TimeSeriesPrecisionRecall class
• unit test of ts_precision_recall function

Deadline

yyyy / mm / dd

Parent issue

If the parent issue exists, post a link here.

References

If there are any reference links, they are described here.

Notes

Other comments.