Country-converter

Minor update, added the citation for the JOSS article.

This is the version after the review for publication in The Journal of
Open Source Software.

Changed

> - Renamed XXin methods to XXas. For example coco.EU27in('ISO3')
> becomese coco.EU27as('ISO3')
> - Some updates in README.rst (related software, badges, motivation)
> - Added CONTRIBUTING.rst

This version is available at Zenodo at 10.5281/zenodo.838036 .

Changed

> - Added CHANGELOG
> - Updated docstrings
> - Account for cases where countries or regions are specified with
> 'exclude ...'
> - Possibility to add custom countryfile for own mappings
> - Not found value can be specified also in the CLI version
> - Automatically detect input format (ISO2, ISO3, ISOnumeric)
> - Change ISO3 for Romania from ROM to ROU (bugfix)
> - Change ISO3 for Congo from COD to COG (bugfix)
> - Updated readme and IPython notebook tutorial

pre 0.4.0 - before 20170501

Initial versions, including CLI and matlab examples.