Fix NuGet restore

Default packages path needs to be .nuget\packages, not packages.

closes #12

Build.cmd

@@ -1,3 +1,3 @@
 @echo off
-powershell -ExecutionPolicy ByPass .\build\Scripts\Windows\Build.ps1 %*
+powershell -NoProfile -ExecutionPolicy ByPass .\build\Scripts\Windows\Build.ps1 %*
 exit /b %ErrorLevel%

build/Scripts/Windows/Build.ps1

@@ -176,7 +176,7 @@ function Locate-NuGetScriptPath {
 
 function Locate-PackagesPath {
   if ($env:NUGET_PACKAGES -eq $null) {
-    $env:NUGET_PACKAGES =  Join-Path -path $env:UserProfile -childPath "Packages\"
+    $env:NUGET_PACKAGES =  Join-Path -path $env:UserProfile -childPath ".nuget\packages\"
   }
 
   $packagesPath = $env:NUGET_PACKAGES