Decoy p-value calculation

cluster_benchmark_summary.tar.gz: This file contains the cluster data for each target in the Benchmark 3.0 dataset,  with decoys obtained by 6 degree sampling using ZDOCK3.0. For each decoy, we list the decoys that are at less than 5 Angstroms ligand Ca RMSD from it. This script computes the P-value of finding at least l near-native decoys when selecting p decoys from a pool of d decoys containing n near-native ones.