Feature: UDP support

[mouse07410]

One of the reasons for our interest in ZeroMQ is its support of UDP (and multicast, but that's secondary).

It would be great if zmq.rs could include UDP support.

Thank you!

[marvin-hansen]

Fully support this feature. UDP would great.

[esemeniuc]

Would love to see Radio dish support, for example http://api.zeromq.org/4-2:zmq-udp

[van-sprundel]

Bump, we still need UDP to make use of zmq.rs. Can someone confirm it's being worked on? Otherwise I'll gladly give it a go