MSVC x64 build configuration
MSVC build scripts.
Merge pull request #240 from jossgray/master

Update msvc solution
Problem: zbeacon_new needs a context

Solution create in node, pass to zbeacon_new. More properly this code
should move to the zbeacon actor API.
Merge pull request #241 from hintjens/master

Problem: zbeacon_new needs a context