added six to pip installs (aimacode#297)

reachtarunhere · web-flow · commit 53ca00316a3f · 2017-03-02T16:39:21.000+05:30
diff --git a/.travis.yml b/.travis.yml
@@ -8,6 +8,7 @@ before_install:
   - git submodule update --remote
 
 install:
+  - pip install six
   - pip install flake8
   - pip install jupyter
   - pip install -r requirements.txt
