Merge pull request #958 from hurtonm/master

Resolve issue #939
Modify MSVC link incremental setting for deconfliction with LTCG flag.
Add executable projects to VS2013 solution.
Merge branch 'zeromq/master'
Merge pull request #959 from evoskuil/master

Update and add executable projects to VS2013 solution.
Cleaned up XFAIL on resources

- this failing test was confusing users
- ZMTP v3.0 now does not define resources at all
- resources, along with other unimplemented aspects moved to
  RFC 37 ZMTP v3.1
Rationalize and update Visual Studio projects and packaging.
Merge branch 'evoskuil/master'
Update packaging metadata.
Merge pull request #960 from evoskuil/master

Rationalize and update Visual Studio projects and packaging.
Update packaging metadata.
Merge pull request #961 from evoskuil/master

Update NuGet packaging metadata.
Incorporate libsodium option and linkage, generalize, update packaging.
Merge branch 'evoskuil/master'
Merge pull request #964 from evoskuil/master

Incorporate libsodium option and linkage, generalize, update packaging.
Update VS build configurations.
Merge pull request #965 from evoskuil/master

Update VS build configurations.
Removed duplicate zmq_z85_* methods from zmq.h

Fixes #967
Merge pull request #968 from hintjens/master

Fixed issue #967
Merge pull request #970 from mditzel/master

Fix issue #969