Add -q option, Travis CI, coverage

[hugovk]

• Add -q option for --quiet.
• Add Travis CI build.
  • Just run some example commands with differing options to make sure they at least run on different platforms.
  • Run with coverage.
  • Flake8.
• Update setup.py's classifiers to match Travis CI Python versions.

Please enable Travis CI and Coveralls for the main repo. https://travis-ci.org/profile https://coveralls.io/repos/new

[aclark4life]

Thanks @hugovk !