add appveyor

Author: stefanpenner

README.md

@@ -1,6 +1,7 @@
 # Ember CLI HTMLBars
 
 [![Build Status](https://travis-ci.org/ember-cli/ember-cli-htmlbars.svg?branch=master)](https://travis-ci.org/ember-cli/ember-cli-htmlbars)
+[![Build status](https://ci.appveyor.com/api/projects/status/b5njc8lsjce76mv6/branch/master?svg=true)](https://ci.appveyor.com/project/embercli/ember-cli-htmlbars/branch/master)
 
 ### Handlebars 2.0 Support
 

appveyor.yml

@@ -0,0 +1,38 @@
+# https://www.appveyor.com/docs/appveyor-yml/
+
+# Test against these versions of Node.js.
+environment:
+  MOCHA_REPORTER: "mocha-appveyor-reporter"
+  matrix:
+    - nodejs_version: "4"
+    - nodejs_version: "6"
+    - nodejs_version: "7"
+
+branches:
+  only:
+    - master
+    - beta
+    - release
+
+# Install scripts. (runs after repo cloning)
+install:
+  - ps: Install-Product node $env:nodejs_version
+  - appveyor-retry npm i -g npm@^3
+  - appveyor-retry yarn
+  - appveyor-retry yarn add mocha-appveyor-reporter # must be installed locally.
+
+cache:
+  - '%LOCALAPPDATA%\Yarn'
+  - '%APPDATA%\Roaming\bower'
+
+# Post-install test scripts.
+test_script:
+  # Output useful info for debugging.
+  - git rev-parse HEAD
+  - cmd: yarn run test
+
+# Don't actually build.
+build: off
+
+# Set build version format here instead of in the admin panel.
+version: "{build}"