Backport for LIBZMQ-541 fix
Rewrite TestConnectDelay
Close inproc socket pairs on zmq_disconnect

This patch fixes LIBZMQ-476 and LIBZMQ-475
support ZMQ_DELAY_ATTACH_ON_CONNECT socket option
Possible fix for a memory leak in Poller.fd_table.
Merge pull request #98 from miniway/master

Possible fix for a memory leak in Poller.fd_table.
Update README.md
[maven-release-plugin] prepare release v0.3.1
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