Merge pull request #739 from mbarbisan/master

Modified the zmq_setsockopt documentation to include the ZMQ_ROUTER_HAND...
Fix for issue 574
Merge pull request #740 from hintjens/master

Fix for issue 574
Simplified error handling for make_fdpair on Windows
Simplified fdpair reset after fork
Fixing issue #583. Using low resolution timer for clock::now_ms
Merge pull request #742 from psl-felipefarinon/master

Fixing issue #583. Using low resolution timer for clock::now_ms
Add test case for many sockets
Merge remote-tracking branch 'upstream/master'
Merge pull request #741 from hintjens/master

Simplified error handling for make_fdpair on Windows
Merge branch 'master' of https://github.com/zeromq/libzmq
Merge pull request #743 from ricnewton/master

Add test case for many sockets
Fixing broken build issue #583
Get maximum number of sockets it can handle from poller_t
Merge branch 'master' of https://github.com/zeromq/libzmq
Merge pull request #744 from psl-felipefarinon/master

Fixing broken build issue #583
Merge branch 'master' of https://github.com/zeromq/libzmq
Fix formatting.
Merge pull request #745 from ricnewton/master

Get maximum number of sockets it can handle from poller_t
Make FD_SETSIZE = ZMQ_MAX_SOCKETS_DFLT + 1 so there is room for the repear socket.