Cecilia2050 classification and Eswatini/Swaziland switch

The country converter (coco) is a Python package to convert and match country names between different classifications and between different naming versions. Internally it uses regular expressions to match country names. Coco can also be used to build aggregation concordance matrices between different classification schemes.

0.6.6 - 20180729

• Added Cecilia2050 classification (merging pull request #36 from @bixiou with some futher modifications)

• Changing Swaziland to Eswatini, following the official name change in April 2018 (https://unterm.un.org/UNTERM/Display/Record/UNHQ/NA/01b637e1-1497-4825-b73d-e0114a7f4d22 …). Closes issue #35

• Removed space from McDonald in "Heard and Mc Donald Islands" and updated offical name to "Territory of Heard Island and McDonald Islands". Closes issus #34.

0.6.5 - 20180309

Coco now includes as switch for including obsolete countries (off by default), see https://github.com/konstantinstadler/country_converter#classification-schemes

Further improved test coverage

0.6.4 - 20180308

Improved test coverage Changed ISO3 for Kosovo from KSV to XKV

0.6.3 - 20180105

Switched ROW in WIOD to RoW