switching from coveralls to codecov

.travis.yml

@@ -24,4 +24,4 @@ install:
 script:
   - coverage run --source descent -m py.test
 after_success:
-  - coveralls
+  - bash <(curl -s https://codecov.io/bash)

requirements-dev.txt

@@ -1,4 +1,3 @@
 -r requirements.txt
-coveralls
 pytest
 coverage

setup.py

@@ -65,7 +65,7 @@ setup(
     # $ pip install -e .[dev,test]
     extras_require={
         'dev': [],
-        'test': ['coveralls', 'pytest', 'nose'],
+        'test': ['pytest', 'coverage'],
     },
 
 )