Uupdate GSL referenece in packaging script.
Updated libzmq imports to include gssapi.
Merge pull request #467 from hintjens/master

Added zsys_run_as () method
Fix trying to save zconfig_t to non-existant path
Merge pull request #468 from phuedx/master

Fix trying to save zconfig_t to non-existant path
zconfig_chunk_save will now save the wole config (sub)tree instead of just one config entry
Merge pull request #470 from xaqq/zconfig_chunk_save

Fix zconfig_chunk_save's abort and save the tree instead of the first entry.
Updated libsodium imports.
Consolidate shared VS props across versions.
Batched VS builds.
Merge pull request #471 from evoskuil/master

Batch VS builds, consolidate shared props, update imports
Use gsl vs. gslgen for batch model builds.
Harden MSBUILD base script against various VS installations.
Optimize VS projects and common props.
Merge pull request #472 from evoskuil/master

Simplify VS project configs and harden MSBUILD script
Sort project.xml and regenerate.
Generating VS 2010/2012 models from master, whitespace difference.
VS props cloning across versions missed two files.
Cast void* to return type.
Conditionally disable non-portable code.