Just imported the package into 5.2 and get errors, specifically in that there is no UnityEditor.SceneManagement, and a couple of other errors. Will see whether I can work around them...
Error importing folder (The pathName assets/plugins/x86_64 is already mapped to e0de61952d6e24418850d8680ad2bd8d. But the meta data wants it to be mapped to 008d2d4b8098841f6bc51d6a5cddb74f)
Error importing folder (The pathName assets/plugins is already mapped to dd1983ee198f44f6d8cf7644a4d9938a. But the meta data wants it to be mapped to 49dd1f5ab2aeb412cabedf7588dcd65a)