Fix powershell streams leaking to standard error#19

Merged

mwrock merged 2 commits intoWinRb:masterfrom

mwrock:progress

Aug 1, 2015

Commits on Aug 1, 2015

silence the progress stream otherwise any output to this stream will leak to stderr. see https://connect.microsoft.com/PowerShell/feedback/details/927384/progress-stream-being-sent-to-stderr-in-win…
mwrock
committed
using write-output instead of write-host since PS v5 now leaks the host stream to stderr
mwrock
committed