Uupdate GSL referenece in packaging script.
Updated libzmq imports to include gssapi.
Updated libsodium imports.
Consolidate shared VS props across versions.
Batched VS builds.
Use gsl vs. gslgen for batch model builds.
Harden MSBUILD base script against various VS installations.
Optimize VS projects and common props.
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.