Make many core many more good

- Explicitly reference the CHM build from the MSI project that consumes
it. (On 8+ cores, sometimes the setup build started while the chm build
was still running.)
- Move GenerateWixInclude invocation to .vcxproj targets since it only
works off .h files.
- Turn on multiproc compilation for C++ (~3 seconds).
Merge pull request #100 from barnson/ManyCore.etc

Make many core many more good