To ensure proper debugging of problems of Windows,
publish PDB debug file along with the binary.

In order to keep paths to the source files clean apply
the technique described by John Robbins in
"PDB Files: what every developer must know"
http://www.wintellect.com/devcenter/jrobbins/pdb-files-what-every-developer-must-know
and build node-sass in the "S:\node_modules\node-sass"

During debugging, source files can be referenced
via the virtual "S:" drive.

This allows users and developers to assign S: drive to the project
root ("node_modules") and access source files without having to redefine
source paths.

Artifact names are generated in a nice, Lisp-styled functional PowerShell
hidden in a YAML folded scalar!

Add node 5 to the PR testing build.