Merge pull request asciidoctor#140 from abelsromero/master

resolves asciidoctor#139 added AppVeyor config file

appveyor.yml

@@ -0,0 +1,29 @@
+version: '{build}'
+skip_tags: true
+clone_depth: 10
+environment:
+  matrix:
+    - JAVA_HOME: C:\Program Files\Java\jdk1.7.0
+    - JAVA_HOME: C:\Program Files\Java\jdk1.8.0
+install:
+  - ps: >-
+      $MVNDIR = 'C:\bin\apache-maven-3.2.3\'
+
+      if(!(Test-Path -Path $MVNDIR )){
+        Write-Host (Test-Path -Path $MVNDIR)
+        Write-Host 'Installing Maven'
+        cinst maven
+      } else {
+        Write-Host 'Found Maven cached installation'
+      }
+# Note: env variables are not correctly updated by choco (setting it manually)
+# Prepend Java entry, remove Ruby entry (C:\Ruby193\bin;) from PATH
+  - cmd: SET PATH=C:\bin\apache-maven-3.2.3\bin;%JAVA_HOME%\bin;%PATH:C:\Ruby193\bin;=%
+  - cmd: mvn --version
+  - cmd: java -version
+build_script:
+  - mvn clean package -B -Dmaven.test.skip=true
+test_script:
+  - mvn test -B
+cache:
+  - C:\bin\apache-maven-3.2.3\