Added Download-File function

This should help those who are building behind a corporate proxy or similar.

scripts/utils.ps1

@@ -89,3 +89,18 @@ function Register-Cmder(){
         New-Item -Path "HKCR:\Directory\Shell\Cmder\Command" -Force -Value "`"$PathToExe`" `"$Command`" "
     }
 }
+
+function Download-File {
+    [CmdletBinding()]
+    param (
+        [string]$Url,
+        [string]$File
+    )
+    begin {
+        $wc = new-object System.Net.WebClient
+        $wc.Proxy.Credentials=[System.Net.CredentialCache]::DefaultNetworkCredentials;    
+    }
+    process {
+        $wc.DownloadFile($Url, $File)    
+    }
+}