Merge branch 'jamadam-i18n-ja'

Author: ironikart

README.markdown

@@ -186,6 +186,7 @@ Special thanks to:
 
 * [nsulzycki](https://github.com/nsulzycki) (Polish Translation)
 * [dmassiani](https://github.com/dmassiani) (French Translation)
+* [jamadam](https://github.com/jamadam) (Japanese Translation)
 
 ## License