added a script to put the dev build on the PATH

scripts/use-dev.ps1

@@ -0,0 +1,11 @@
+# Put the stage2 output on the front of the path
+$stage2 = "$PSScriptRoot\..\artifacts\win7-x64\stage2\bin"
+if (Test-Path $stage2) {
+    $splat = $env:PATH.Split(";")
+    $stage2 = Convert-Path $stage2
+    if ($splat -notcontains $stage2) {
+        $env:PATH="$stage2;$env:PATH"
+    }
+} else {
+    Write-Host "You don't have a dev build in the 'artifacts\win7-x64\stage2' folder!"
+}