create update script for running installs

[bartsn]

To prevent over and over download of bulky install files: is it possible to write an update Python script which:

1. one can run within Jupyter notebook.
2. Which fetchs updated Python Labcontrol scripts

This script should be able to download a set of relevant source code, directly from GitHub. A possible way to do so, is making use of the requests library.

See:

1. https://requests.readthedocs.io/en/latest/user/quickstart/#make-a-request
2. https://stackoverflow.com/questions/26000336/execute-curl-command-within-a-python-script