Added libzmq dependency inside libf77zmq.so

Better AC macro

Merge pull request #22 from scemama/master

Accept both Python2 and Python3

Merge pull request #21 from scemama/master

install -D

Merge pull request #18 from scemama/master

Changes for 4.2

Merge pull request #14 from scemama/master

Better handling of setsockopt

Travis with zmq 4.0.6 because of libsodium requirement