The current Get_RemoteChecksum implementation uses Invoke-WebRequest
which can be slow on larger files. This results in a long checksumming
process during automated packaging. By switching to the .NET webclient,
while losing the "interactive" download update, we significantly increase
the speed of the download. For example, on a 150 mb file, it went from minutes
to download to seconds.

* 'develop' of github.com:chrrobi/chocolatey-au:
  Change the way the file is downloaded to speed it up

The current Get_RemoteChecksum implementation uses Invoke-WebRequest
which can be slow on larger files. This results in a long checksumming
process during automated packaging. By switching to the .NET webclient,
while losing the "interactive" download update, we significantly increase
the speed of the download. For example, on a 150 mb file, it went from minutes
to download to seconds.

Added modified date in this commit

The current Get_RemoteChecksum implementation uses Invoke-WebRequest
with progress bar which can be slow on larger files. This results in a
long checksumming process during automated packaging. By providing the
option to hide the progress bar, while losing the "interactive" download
update, we significantly increase the speed of the download.