Merge pull request #402 from phillipj/feature/travis-v0.11

Also run node v0.11 on travis

.travis.yml

@@ -3,4 +3,7 @@ node_js:
   - 0.6
   - 0.8
   - '0.10'
-
+  - 0.11
+matrix:
+  allow_failures:
+    - node_js: 0.11