* The Microsoft servers now use session Id whitelisting, so add querying
of https://vlscppe.microsoft.com/tags with the session Id.
* Closes#52.
* Also harmonize/improve -replace calls
* Also make sure we use POST for the getskuinformationbyproductedition
query (in case Microsoft add some more countermeasures).
* Also drop 'cmd /c' invocation in sign.sh since the cygwin people can't
seem to get their act together there...
* Also let external app close cookie prompt when a pipe is provided
and use a more explicit Continue/Back scheme for button labels.
* Also add signature script
