Version 2.4
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* Call RJSONIO::fromJSON explicitly to avoid conflict with JSON package (Thanks to Richard Cotton)

Version 2.3
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* Change default start/end date per user request

Version 2.2
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* Bug: country names were stripped of digits

Version 2.1
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* Fixed various issues (thanks to Matthieu Stigler for bug reports and patches)
* Faster downloads when requesting multiple countries (leveraging the US;BR;CA API syntax)

Version 2.0
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* Now uses JSON instead of XML (Faster, easier)
* WDIcache function now allows users to update the locally stored database of available WDI series
* Fixed doc examples  
* Documentation now uses roxygen2
* Moved development to github 
* Series and country info now in a single data list. utf-8 encoding fixed