Updated to work with CZMQ/2.x
Merge pull request #107 from hintjens/master

Updated to work with CZMQ/2.x
Fixed Travis CI build for security
Merge pull request #108 from hintjens/master

Fixed Travis CI build for security
Merge pull request #1 from zeromq/master

Merge latest from zeromq:master.
Merge branch 'master' into without-libfmq