Added args support for hubs/app.py so a dev can specify
the host and port variables when running a dev server

I think I'd rather have a runserver.py script to do this than adding CLI options to the web app :)

Fair enough!

I have updated the branch with a few more commits, adding a runserver.py, and updating the readme to say that runserver.py is the script to run the dev server now.

:thumbsup: thanks :)

I think we don't need PYTHONPATH anymore. :relaxed:

I had the same thought, we just need to check it (since it's also asked for
the populate.py script above) and I thought it does no harm in the mean
while (thus my +1).

yeah! right. populate.py would also not require PYTHONPATH. I have using it without the PYTHONPATH

Ok so let's remove the two PYTHONPATH and we're good to merge :)

:thumbsup: