japanese translation

[GoogleCodeExporter]

I made japanese translation files.

Original issue reported on code.google.com by h.rayflood on 20 Jan 2015 at 9:01

Attachments:

• CityMessages_ja_JP.properties
• CityStrings_ja_JP.properties
• GuiStrings_ja_JP.properties
• StatusMessages_ja_JP.properties

[hATrayflood]

I sent pull request #75 please review and merge.