Add codecov support.

.travis.yml

@@ -2,11 +2,15 @@ language: python
 python:
 - 2.7
 - 3.4
+- 3.5
 before_install:
+- pip install nose coverage codecov
 - pip install -r requires/testing.txt
 install:
 - pip install -e .
-script: nosetests
+script: nosetests --with-coverage
+after_success:
+- codecov
 sudo: false
 deploy:
   distributions: sdist bdist_wheel

docs/conf.py

@@ -32,6 +32,7 @@ html_theme_options = {
     'description': 'Tornado application runner',
     'github_banner': True,
     'travis_button': True,
+    'codecov_button': True,
 }
 
 intersphinx_mapping = {