Add codecov to tox and travis

.travis.yml

@@ -56,4 +56,5 @@ install:
 script: tox
 
 after_success:
-    - if [[ $TOXENV == "py" ]]; then tox -e coverage; fi
+    - if [[ $TOXENV == "py" ]]; then tox -e coverage,codecov; fi
+

tox.ini

@@ -25,6 +25,12 @@ commands=coverage erase
          coverage report --rcfile={toxinidir}/tox.ini
          coverage xml
 
+[testenv:codecov]
+description=[Only run on CI]: Upload coverage data to codecov
+deps=codecov
+skip_install=True
+commands=codecov --file {toxworkdir}/coverage.xml
+
 [coverage:run]
 source=setuptools