Merge branch 'master' of https://github.com/zeromq/libzmq
Merge pull request #1123 from hurtonm/master

Resolve issue #949
Merge branch 'master' of https://github.com/zeromq/libzmq
Add test for unbinding inproc socket.
Merge pull request #1124 from ricnewton/master

Add test for unbinding inproc socket.
Code cleanup