Looking for MQTT client library

[Frank Pagliughi via Digitalmars-d-learn]

I am writing a D wrapper for the Eclipse Paho C library. I know 
MQTT, but don't know D very well - this was an attempt for me to 
learn D a little better for a non-trivial example. It's a little 
tricky since the underlying library is multi-threaded and making 
callbacks from different threads.

I have the basics all working on Linux, but need to nail down a 
few issues of message (data) immutability. And I need to start 
testing on Windows.

Oh, and I haven't the slightest idea how to package a D library 
for distribution. Where do I learn how to do that?