wandafulworld/cayleytree: Initial Release

This is the first release of this project, for the purpose of creating a Zenodo DOI. As of now the package contains implementations of five isotropic trees and two anisotropic trees. Cayley tree, available with nearest and next-nearest neighbor hopping. Lieb-Cayley tree Double Lieb-Cayley tree Cayley tree with Husimi decoration Cayley tree with Clique decoration (called 'LiebHusimi tree' in this package) The two anisotropic trees being: Cayley tree with Haldane decoration Cayley tree with Qi-Wu-Zhang decoration