2017-11-29 Susumu Tanimura <aruminat@gmail.com>
	* Initial release. version 0.1
	* Added JapanPrefCartogram() and JapanPrefCartogram.R
	* Changed JapanPrefecturesMap() to JapanPrefMap()
2017-11-28 Susumu Tanimura <aruminat@gmail.com>
	* Fixed NAMESPACE
	* Revised DESCRIPTION
2016-01-06 Susumu Tanimura <aruminat@gmail.com>
	* Moved JapanPrefecturesMap() of Nippon as a new package