Use pylama for stylechecks

.travis.yml

@@ -10,11 +10,9 @@ matrix:
       install:
         - pip install -r requirements.txt
         - pip install -r testing_requirements.txt
-        - pip install flake8
-        - pip install isort
+        - pip install pylama
       script:
-        - flake8 tsstats
-        - isort -c -rc tsstats
+        - pylama tsstats
 
 install:
   - pip install -r requirements.txt