Adicionando verificação de PEP8 no build do travis.
diff --git a/.travis.yml b/.travis.yml
index 4c7aa16..e5137ed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,5 +5,7 @@
     - DJANGO_VERSION=1.4.3
 install:
     - pip install -q Django==$DJANGO_VERSION
+before_script:
+    - "pep8 --exclude=migrations --ignore=E501,E225 dojopuzzles"
 script:
     - python manage.py test --settings=test_settings.py