Copy of client args, and restrict travis to only master (still build for PR though)

I'm dumb.

.travis.yml

@@ -30,6 +30,9 @@ script: nosetests -v test_twython:TwythonAPITestCase test_twython:TwythonAuthTes
 install: pip install -r requirements.txt
 notifications:
   email: false
+branches:
+  only:
+    - master
 after_success:
   - coverage run --source=twython setup.py -q nosetests
   - coveralls