2018-05-16 Susumu Tanimura <aruminat@gmail.com>
        * Version 0.2
        * Reworte NipponMap-package.Rd with a new template to synchronize
        package version with the DESCRIPTION file
        * Fixed JapanPrefMap.Rd
        * Revised JapanPrefMap.R to set transparent color if col is null. 
2017-11-30 Susumu Tanimura <aruminat@gmail.com>
	* Revised NipponMap-package.Rd
2017-11-29 Susumu Tanimura <aruminat@gmail.com>
	* Initial release. version 0.1
	* Added JapanPrefCartogram() and JapanPrefCartogram.Rd
	* 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