Use Codecov for coverage measurement (#913)

* install codecov

* upload to codecov

Author: jenshnielsen

.travis.yml

@@ -37,14 +37,16 @@ before_script: # configure a headless display to test plot generation
 script:
     - cd qcodes
     - py.test --cov=qcodes --cov-report xml --cov-config=.coveragerc
+    # build docs with warnings as errors
     - |
       cd ../docs
       make SPHINXOPTS="-W" html-api
     - cd ..
 
 after_success:
-    # install dependencies for docs build
+    # upload code coverage
     - python-codacy-coverage -r qcodes/coverage.xml
+    - codecov
     # upload the docs
     - |
       if [[ $TRAVIS_REPO_SLUG == "QCoDeS/Qcodes" && $TRAVIS_BRANCH == "master" && $TRAVIS_PULL_REQUEST == "false" ]]; then

test_requirements.txt

@@ -5,3 +5,4 @@ codacy-coverage
 hypothesis
 pyvisa-sim
 lxml
+codecov