add util script to create skeleton of HUC12 directories
add util script to create skeleton of HUC12 directories
akrherz/idep,akrherz/dep,akrherz/idep,akrherz/dep,akrherz/idep,akrherz/dep,akrherz/idep,akrherz/idep,akrherz/idep,akrherz/dep,akrherz/dep