Version 0.13 (2013-03-19)
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* add sint maartin & curacao (thanks johnb30)

Version 0.12 (2013-03-08)
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* Missing wb codes filled-in using iso3c
* Added South Sudan
* Thanks to Rod Alence!

Version 0.11 (2013-02-12)
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* Vietnam cown
* Regexes:
    - Dominica / Dominican Republic
    - New Zealand / Aland

Version 0.10 (2013-01-20)
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* De-duplicate Sudan
* Niger vs. Nigeria regex

Version 0.9 (2012-12-26)
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* Fixed regexes: Mali, Korea, Oman, Dominica

Version 0.8 (2012-06-26)
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* Added World Bank (wb) country codes. Very similar, but slightly different from iso3c. 

Version 0.7 (2012-06-01)
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* Removed useless functions countrycode.nomatch and countryframe
* Fixed 2 Congo-related problems
* Added option for countrycode() to report codes for which no match was found
* Moved documentation to roxygen2
* Fixed Trinidad Tobago regex
* Added UN and FAO country codes