Initial release of the PReP implementation

This repository provides a reference implementation of PReP as described in the paper:

PReP: Path-Based Relevance from a Probabilistic Perspective in Heterogeneous Information Networks
Yu Shi, Po-Wei Chan, Honglei Zhuang, Huan Gui, and Jiawei Han.
In Proceedings of the 23nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, ACM, 2017.