Random SPR Walk v1.0.0

Software for sampling random walks on rooted phylogenies via subtree-prune-and-regraft (SPR) or nearest neighbor interchange (NNI) moves. Initial version used for the paper:

C. Whidden And F. A. Matsen IV. Ricci-Ollivier Curvature of the Rooted Phylogenetic Subtree-Prune-Regraft Graph.