Add test suite and initial support for PyPI publishing via Travis CI

[hectcastro]

This changeset adds a basic unittest suite for this project, along with instructions for executing it locally and inside of a Docker container. In addition, support for Travis CI was added to execute the test suite after linting.

PyPI deployment has not been tested, but it will only be triggered on Git tags.

Attempts to resolve #4 and #5.

[sharph]

I'm a fan of 80 column lines for the linter, and that's what I was aiming for when I wrote it (mostly to make flake8 happy,) but the JEST standard is 100 columns. @ddohler & @notthatbreezy do you have thoughts on this?

[notthatbreezy]

I like 100 columns personally

[sharph]

LGTM, aside from the line length issue

[hectcastro]

Added flake8 configuration file with settings for 100 column length lines. Also reverted the changes that were made to accommodate the default column width setting.

[notthatbreezy]

+1