Merge pull request #73 from aholmes/build-cmd

Update build.cmd to avoid usage of curl, and to instead shell out to …

Author: zhengbli

build.cmd

@@ -1,10 +1,12 @@
 @echo off
 cls
 
-if not exist .paket (
+if not exist .paket mkdir .paket
+
+if not exist .paket/paket.bootstrapper.exe (
   @echo "Installing Paket"
-  mkdir .paket
-  curl https://github.com/fsprojects/Paket/releases/download/2.12.5/paket.bootstrapper.exe -L --insecure -o .paket\paket.bootstrapper.exe
+  Powershell.exe -Command "Invoke-WebRequest -Uri https://github.com/fsprojects/Paket/releases/download/2.12.5/paket.bootstrapper.exe -OutFile .paket\paket.bootstrapper.exe"
+
 
   .paket\paket.bootstrapper.exe prerelease
   if errorlevel 1 (