stdint.h is not available on all platforms
Fixed build for MSVC 2008
Merge pull request #681 from ipechorin/master

stdint.h is not available on all platforms
Merge pull request #682 from hintjens/master

Fixed build for MSVC 2008
Updated libzmq CURVE to track RFC 27

* The INITIATE command vouch box is Box[C',S](C->S') instead of Box[C'](C->S),
  as recommended by https://codesinchaos.wordpress.com/2012/09/09/curvecp-1/,
  to reduce the risk of client impersonation.

* Mirrors the change in libcurve and CurveZMQ specifications.
Merge pull request #683 from hintjens/master

Updated libzmq CURVE to track RFC 27
Call flush after writing the identity message
Merge pull request #684 from hurtonm/master

Call flush after writing the identity message
Build/test errors on OS/X with clang++
curve_keygen needed assert.h
Merge pull request #685 from hintjens/master

Build/test errors on OS/X with clang++
Added test case for issue 566

* Tests dealer-to-router connection 100 times
* This was failing in ZMQ v4.0.0 RC1
Merge pull request #686 from hintjens/master

Added test case for issue 566
Updated CMake project for test_issue_566
Merge pull request #687 from hintjens/master

Updated CMake project for test_issue_566