(GH-12) Add appveyor configuration file

This commit adds an appveyor configuration file to perform ruby spec and
rubocop testing, as well as packging the extension.

Author: glennsarti

appveyor.yml

@@ -0,0 +1,93 @@
+version: 0.0.4-appv.{build}
+branches:
+  only:
+  - add-travis-appveyor
+  - language-server-feature
+clone_depth: 10
+init:
+- SET
+
+environment:
+  matrix:
+  # Language Server testing
+  # LTS Agent
+  - PUPPET_GEM_VERSION: "~> 4.7.0"
+    RUBY_VER: 21-x64
+    RAKE_TASK: test
+  # Latest 4.x branch
+  - PUPPET_GEM_VERSION: "~> 4.0"
+    RUBY_VER: 21-x64
+    RAKE_TASK: test
+  # Latest Puppet
+  - PUPPET_GEM_VERSION: "> 4.0.0"
+    RUBY_VER: 23-x64
+    RAKE_TASK: test
+  # Ruby style
+  - PUPPET_GEM_VERSION: "> 4.0.0"
+    RUBY_VER: 23-x64
+    RAKE_TASK: rubocop
+
+  # Extension testing
+  # Package it up to a VSIX
+  - nodejs_version: "7.4.0"
+    nodejs_arch: "x64"
+    GULP_BUILD_TASK: build
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    # Ruby style
+    - PUPPET_GEM_VERSION: "> 4.0.0"
+      RUBY_VER: 23-x64
+      RAKE_TASK: rubocop
+
+install:
+- ps: |
+     Write-Host "Setting build version..."
+     $ENV:APPVEYOR_BUILD_VERSION | Out-File -FilePath 'server\lib\puppet-languageserver\VERSION' -Encoding ASCII -Confirm:$false -Force
+
+     if ($ENV:RUBY_VER -ne $null) {
+       Set-Location -Path ".\server"
+       $ENV:Path = 'C:\Ruby' + $ENV:RUBY_VER + '\bin;' + $ENV:Path
+
+       Write-Host "Ruby Version..."
+       & ruby -v
+       Write-Host "Gem Version..."
+       & gem -v
+       Write-Host "Bundle Version..."
+       & bundle -v
+       & bundle install
+
+       type Gemfile.lock
+     }
+
+     if ($ENV:nodejs_version -ne $null) {
+       Install-Product node $env:nodejs_version $env:nodejs_arch
+       Set-Location -Path ".\client"
+
+       Write-Host "Node Version..."
+       & node --version
+
+       Write-Host "Updating npm..."
+       & npm install -g npm@4 --silent
+
+       Write-Host "npm Version..."
+       & npm --version
+
+       Write-Host "Installing modules..."
+       & npm install --silent
+
+       Write-Host "Set the package.json version..."
+       & node node_modules\gulp\bin\gulp.js bump --version $ENV:APPVEYOR_BUILD_VERSION
+     }
+
+build_script:
+- cmd: IF NOT [%GULP_BUILD_TASK%] == [] node node_modules\gulp\bin\gulp.js %GULP_BUILD_TASK%
+
+test_script:
+- cmd: IF NOT [%RAKE_TASK%] == [] bundle exec rake %RAKE_TASK%
+- cmd: IF NOT [%NPM_TASK%] == [] npm run %NPM_TASK%
+- cmd: IF NOT [%GULP_TASK%] == [] node node_modules\gulp\bin\gulp.js %GULP_TASK%
+
+artifacts:
+- path: client/*.vsix