Use nvm

Author: Emmanouil Konstantinidis

.travis.yml

@@ -11,8 +11,8 @@ env:
   - DJANGO_VERSION=1.8
   - DJANGO_VERSION=1.9
 
-node_js:
-  - "5"
+before_install:
+  - nvm install 5
 
 install:
   - cd rest_framework_docs/static/ && npm install && cd ../../