Revert "[coverage reports] change to coveralls as test"

This reverts commit 040ac72b82.

.travis.yml

@@ -28,8 +28,7 @@ before_install:
 install:
 - echo $PATH
 - source install_retry.sh
-#- pip install codecov
-- pip install coveralls
+- pip install codecov
 - pip install pypandoc
 - pip install git+git://github.com/BRML/climin.git
 - pip install autograd
@@ -40,8 +39,7 @@ script:
   - coverage run travis_tests.py
 
 after_success:
-  #- codecov
-  - coveralls
+  - codecov
 
 before_deploy:
   - cd doc

appveyor.yml

@@ -24,8 +24,7 @@ install:
  # GPy needs paramz
  - python -m pip install paramz
  - python -m pip install nose-show-skipped
-# - python -m pip install coverage
- - pip install coveralls
+ - python -m pip install coverage
  - python -m pip install codecov
  - python -m pip install twine
  - "python setup.py develop"
@@ -46,8 +45,7 @@ test_script:
 after_test:
   # This step builds your wheels.
   - "python setup.py bdist_wheel bdist_wininst"
-  #- codecov
-  - coveralls
+  - codecov
   
 artifacts:
   # bdist_wheel puts your built wheel in the dist directory