Add AppVeyor configuration file

appveyor.yml

@@ -0,0 +1,23 @@
+---
+# http://www.appveyor.com/docs/appveyor-yml
+
+# Build version format
+version: "{build}"
+
+# Do not build on tags (GitHub only)
+skip_tags: true
+
+environment:
+  nodejs_version: '4'
+
+install:
+  - ps: Install-Product node $env:nodejs_version
+  - npm install
+
+test_script:
+  - node --version
+  - npm --version
+  - npm test
+
+# Don't actually build
+build: off