Make Travis use docker.

ftobia · ftobia · commit 94e63ff58716 · 2015-08-04T21:25:24.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -13,3 +13,4 @@ script:
   - tox -e $TOX_ENV
 after_success:
   coveralls
+sudo: false
