Golang Port: mailstrip

Hi,

thanks for email_reply_parser. I've ported it to golang and was wondering if you'd like to mention it as a port in the README? I'll send a pull request if you're interested.

http://github.com/ThomsonReutersEikon/mailstrip

Review the repository README and the linked mailstrip project to confirm the port details and link. Done means the README accurately mentions the Go port without changing the parser itself.

索引モデルが issue の本文から書いたものです。