Separate automated tests and examples

- Keep automated tests to be run with py.test in './tests/'
  and examples in './examples/'
- Rename test to adhere to 'Conventions for Python test discovery'
  (http://pytest.org/latest/goodpractises.html#test-discovery)

.travis.yml

@@ -11,7 +11,7 @@ install:
   #- python setup.py install
 
 before_script:
-  - pip install -r test_requirements.txt --use-mirrors
+  - pip install -r requirements-dev.txt --use-mirrors
 
 script: 
   - py.test --pep8 mwclient -v --doctest-modules tests/client-test.py

tests/client-test.py → tests/client_test.py

-#encoding=utf-8
+# encoding=utf-8
 import unittest
 import sys
 import os