Implement compressive permutation sampling

As described in 4.3 of _Jia, Ruoxi, David Dao, Boxin Wang, Frances Ann Hubis, Nick Hynes, Nezihe Merve Gürel, Bo Li, Ce Zhang, Dawn Song, and Costas J. Spanos. ‘Towards Efficient Data Valuation Based on the Shapley Value’. In Proceedings of the 22nd International Conference on Artificial Intelligence and Statistics, 1167–76. PMLR, 2019. http://proceedings.mlr.press/v89/jia19a.html._