fix pyflakes errors
add pep8 command to setup.py (run with: python setup.py pep8)
Merge pull request #9 from shawnps/pyflakes

fix pyflakes errors
Merge pull request #10 from shawnps/setup-py

add pep8 command to setup.py (run with: python setup.py pep8)
fix test to fail
Merge pull request #11 from narusemotoki/develop

fix test to fail
move requirements.txt, add travis.yml