pycrs - parse in clipping-raster

[Krisselack]

In clipping-raster.ipynb the following needs to be changed (pycrs-1.0.0, python 3.6):
From pycrs.parser... to pycrs.parse...

out_meta.update({"driver": "GTiff",
                 "height": out_img.shape[1],
                 "width": out_img.shape[2],
                 "transform": out_transform,
                 "crs": pycrs.parser.from_epsg_code(31256).to_proj4()}
                         )