Nctoolkit

New methods

You can now shift time forwards or backwards using the shift_hours and shift_days methods.

You can now add new files to existing datasets using the append method.

Bug fixes

Cleanup code fixed to ensure temporary grid files are removed. This only appears to have affected to_latlon.

ensemble_min ignored time when cdo version = 1.9.3. Now fixed to work properly with cdo version 1.9.3.

This release is a minor update, which is compatible with the previous releases.

New methods have been added for calculating zonal statistics: ``zonal_mean``, ``zonal_min``, ``zonal_max`` and ``zonal_range``.

``open_data`` is now able to accept urls.

Initial release