Use click or the standard library for command-line parsing

[marfox]

param_test.py should be replaced with available libraries that handle the command line. You can choose between:

1. click - PRO: super simple and pythonic. CON: external dependency
2. argparse - PRO: Python standard library, just import argparse. CON: less pythonic than click.

[papalinis]

Used argparse to handle arguments from command line.
Have a check to main() to ensure the correct usage of library.
Comments would be appreciated.