Update Readme File

git-svn-id: https://plugins.svn.wordpress.org/no-japanese-comments/trunk@859282 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add Plugin Language Text Domain Information

git-svn-id: https://plugins.svn.wordpress.org/no-japanese-comments/trunk@860048 b8457f37-d9ea-0310-8a92-e5e31aec5664