Fix warnings.
Add pyflakes checks into test suite.
Fix newline.
Replace pyflakes with flake8 in the testsuite, and add configuration to tox.ini
Apply best practices: pin versions
Skip the traceback on Control+C and Broken pipe signals; fixes lp:1285290
Add a link to Flake8 in the README.
Hopefully it will avoid some invalid bug reports
Use HTTPS
Merge pull request #4 from myint/patch-1

Use HTTPS links in README