* added temporary readme

git-svn-id: https://a.jtime.net/svn/misc/ruby-libir@47 6c23ddd9-6acf-e011-bcb5-000c29b07eb3
 * readme

git-svn-id: https://a.jtime.net/svn/misc/ruby-libir@48 6c23ddd9-6acf-e011-bcb5-000c29b07eb3
Merge branch 'master' of https://github.com/kazubu/libir-ruby
 * more readable