Minor changes

Tried to unify style a little bit.

In particular, I've removed instances of `write-host`. Unless there was a conscious reason to use it, it should always be avoided.

http://www.jsnover.com/blog/2013/12/07/write-host-considered-harmful/
I forgot. PS adds more streams, like the 'verbose' stream. Output from that is muted by default. Gotta pass the `-verbose` param to the cmdlet call or set `$global:VerbosePreference = "continue"` somewhere, probably inside the script. It'd be good to reset the original value on exit, I suppose.