use travis container-based infrastructure (#250)

fieg · web-flow · commit 276c6b5b9fca · 2016-08-26T13:01:51.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,5 @@
+sudo: false
+
 before_script:
   - npm install
   - npm install -g bower
