use scipy.linalg.cho_factor and scipy.linalg.cho_solve instead of lack calls which was depending on scipy version, add docstring, add cholesky_invert
use scipy.linalg.cho_factor and scipy.linalg.cho_solve instead of lack calls which was depending on scipy version, add docstring, add cholesky_invert

timahutchinson/desispec,gdhungana/desispec,profxj/desispec,profxj/desispec,timahutchinson/desispec,desihub/desispec,gdhungana/desispec,desihub/desispec