Update github url for open source data in py-cartopy

[essandess (Steve Smith)]

The github structure has changed for open source zip files used by this project.

Use this edit to the file /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cartopy/io/shapereader.py

    # https://github.com/nvkelso/natural-earth-vector/blob/v2.0/zips/110m_physical/ne_110m_ocean.zip
    # _NE_URL_TEMPLATE = ('https://github.com/nvkelso/natural-earth-vector/'
                        # 'raw/master/zips/{resolution}_{category}/'
                        # 'ne_{resolution}_{name}.zip')
    _NE_URL_TEMPLATE = ('https://github.com/nvkelso/natural-earth-vector/'
                        'blob/v2.0/zips/{resolution}_{category}/'
                        'ne_{resolution}_{name}.zip?raw=true')

[larryv (Lawrence Velázquez)]

Thanks. In future tickets, please Cc relevant port maintainers (port info --maintainers py-cartopy).

[petrrr]

Thanks for the report.

Note that here we only maintain the port of this software not cartopy itself. It is somewhat difficulties to evaluate your fix. If we need to apply a patch, it would be very helpful to completely understand what change makes this fix necessary and if the patch is appropriate.

Probably your fix would be best handled upstream and we then can update to the new release. You may reference the report here, so we can understand how to handle this in the meantime.

[ryandesign (Ryan Carsten Schmidt)]

This appears to have been changed to a different URL in 0.12.0 (or earlier).