- get rid of unnecessary dependencies in setup.py

- try a different approach to installing deps in travis

Author: radix

.travis.yml

@@ -8,10 +8,7 @@ python:
     - "pypy"
 install:
     - pip install -r dev-requirements.txt
-    - pip install six
-    - pip install 'characteristic>=14.0.0'
-    - pip install sphinx
-    - pip install effect
+    - pip install .
 script:
     - make lint
     - py.test

setup.py

@@ -16,5 +16,5 @@
         'Programming Language :: Python :: 3',
         ],
     packages=['txeffect'],
-    install_requires=['effect', 'twisted', 'six', 'characteristic>=14.0.0'],
+    install_requires=['effect', 'twisted'],
     )