$ python fit_analysis.py --help
usage: fit_analysis.py [-h] [-c CONFIG_FILE] [-b BACKEND]
configuration arguments provided at run time from the CLI
optional arguments:
-h, --help show this help message and exit
-c CONFIG_FILE, --config-file CONFIG_FILE
config file
-b BACKEND, --backend BACKEND
pyhf backend str alias
* Add --backend argparse to fit_analysis.py to allow for setting the backend from the CLI
* Add use of --backend in example in README