Test Windows build using Travis

.travis.yml

@@ -12,3 +12,17 @@ script:
 after_success:
     - if [ "$TRAVIS_BRANCH" = "master" ]; then pip install pycurl requests && contrib/make_locale; fi
     - coveralls
+jobs:
+  include:
+    - stage: windows build
+      sudo: true
+      python: 3.5
+      install:
+        - sudo dpkg --add-architecture i386
+        - wget -nc https://dl.winehq.org/wine-builds/Release.key
+        - sudo apt-key add Release.key
+        - sudo apt-add-repository https://dl.winehq.org/wine-builds/ubuntu/
+        - sudo apt-get update -qq
+        - sudo apt-get install -qq winehq-stable dirmngr gnupg2 p7zip-full
+      script: ./contrib/build-wine/build.sh
+      after_success: true