Hello,
Sorry for my late reply.
At the moment I am trying to make your existing library work with the traditional Arduino Uno + Ethernet shield setup. However I am running into a lot of problems.
However, I will keep you updated if I make any progress.
My idea is, to simply replace the YunServer and YunClient with the existing EthernetServer and EthernetClient from the Ethernet library.
Do you think this is a promising way to make it work?
On the official Arduino Website it is stated, that the YunServer and YunClient are “modeled after the Ethernet Server class and EthernetClient class”.
http://arduino.cc/en/Reference/YunBridgeLibrary