Prepare for packaging

[mgrabovsky]

Prepare the application for packaging.

• Clarify the scope and functionality of sms.
• Submit to PyPI or write an RPM spec file.

Related: #2, #8

[mgrabovsky]

See https://github.com/navdeep-G/samplemod, https://github.com/navdeep-G/setup.py and the Python Packaging Guide for reference.