Workaround for travis multiprocessing issue

See travis-ci/travis-cookbooks#155

.travis.yml

@@ -4,6 +4,12 @@ python:
     - 2.7
     - 3.2
     - 3.3
+before_install:
+    # Workaround for a permissions issue with Travis virtual machine images
+    # that breaks Python's multiprocessing:
+    # https://github.com/travis-ci/travis-cookbooks/issues/155
+    - sudo rm -rf /dev/shm
+    - sudo ln -s /run/shm /dev/shm
 install:
     - python bootstrap.py
     - bin/buildout