Add multihost plugin for free-way.me

Hi there,

please merge our multi host plugin for free-way.me. (Developed by Nicolas Giese)

This is a first version to get it work. <b>We are looking for a volunteer who improves the error handling for us</b> (I don't have the necessary skills).
If you like to add error handling to this plugin, please write me an e-mail (english/german) to flubshi@free-way.me I will provide you all information about possible error messages, suggested handling of it, and you will get an account to test it.

Thanks in advance!