Change save locations to act more like Python
Change save locations to act more like Python

Script will now download and unpack in $env:Temp and output final result
to $pwd\BootCamp-$Version like Python Script

Python uses a randomly generated directory in temp, but use a
predictable one to allow us to check if .pkg is already downloaded and
skip if so.

timsutton/brigadier,timsutton/brigadier