Merge pull request #15 from PolymerElements/add-travis-config

[testing] use Travis CI for testing

.travis.yml

@@ -0,0 +1,28 @@
+language: node_js
+sudo: false
+matrix:
+  include:
+  - node_js: stable
+    script: xvfb-run wct
+    addons:
+      firefox: latest
+      apt:
+        sources:
+        - google-chrome
+        packages:
+        - google-chrome-stable
+  - node_js: node
+    script:
+    - |
+      if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then
+        wct -s 'default'
+      fi
+before_script:
+- npm install web-component-tester
+- npm install bower
+- export PATH=$PWD/node_modules/.bin:$PATH
+- bower install
+env:
+  global:
+  - secure: RKVKT0Yhqjp617OBwSXbOKMh1ivGExp8P2NB/tfNqksgG1mAlCRDiAW4raOjMh5asUbxlQsRQfMwrrJmOM392skkl4+N4wBCPX00XLG4Dc9BirLa0D5AtkSjYOtEYplWOPkQgeXTXLn8NdZsNnyu4r+FG3lH9WIbhF/QPbYUmB4=
+  - secure: da6fTrKTSDAtuTp0r8ORY+6UTJIVVwiZ0meqqaR3hKdHiXKjaTbQTUqH1x9Z6wj+zccenHrC+OyKANH7FHHriv0XLwU/GXoZd1rUiUfNrMhGZ32YHSvLJ6P64a/yaBS3432h504TkfSI6m0ZQc+KdxYgXxJBffYf1sfVGFw0osw=