New release resolving a number of bugs:
- a crucial bug occurring when storing datasets during downscalng in
topo_scale.py. More details in issues: #60 and commit a33e79f
- a bug resolved in
to_crocus() 4e73489
- a bug when computing level elevation from geopotential 6a4c68e
- a bug in to_musa() 81e8978
