Docs/Tutorials should be updated to remind users to run setup_walkoff.py and walkoff.py with sudo

[astrohart]

On a fresh Ubuntu Desktop 18.04 LTS VM with the WALKOFF pre-reqs installed, and after having cloned master to a sub-folder in the Home directory of my non -root user, it seems to be the case that

$ python3 setup_walkoff.py

(assuming we've cd'd into the WALKOFF directory) will not work because it does not have enough permissions. The following works:

$ sudo python3 setup_walkoff.py

and

$ sudo python3 walkoff.py

I think the docs should be updated to let users know that they need to launch setup_walkoff.py and walkoff.py both using sudo when running natively.

[astrohart]

Actually, cancel my last, I will close this issue and open a new one.