Feature: --version to command line utility

[RhetTbull]

Add --version option to cmd_line.py

[RhetTbull]

Update version in setup.py. See this snippet from requests/setup.py:

https://github.com/psf/requests

about = {}
with open(os.path.join(here, 'requests', 'version.py'), 'r', 'utf-8') as f:
exec(f.read(), about)

with open('README.md', 'r', 'utf-8') as f:
readme = f.read()
with open('HISTORY.md', 'r', 'utf-8') as f:
history = f.read()

setup(
name=about['title'],
version=about['version'],
description=about['description'],
long_description=readme,
long_description_content_type='text/markdown',
author=about['author'],
author_email=about['author_email'],
url=about['url'],