Fix and enhance main python

[ankostis]

As explained in the commits, the V380_complete_public.py has been taken care of:

• fix: indentation
• fix: remove unused getch import
• enh: factor-out url/ports & cmd duration (0.5sec)
• refact: read ptz-files in a dict, help msg on bad key
• enh: modfularize code to call it with python -m, to allow to run it from an arbitrary folder, so as to save captured images outside of project.
• doc: update instructions; explain what to pip-install

[ankostis]

Thank you for the handy utility project :-)

[sobhaniot]

Hi, I am using your code for V380 IP camera. I have an error when using the ptz command to move the camera. This xml code works, but the camera moves as far as possible. Why? How can I use it for step-by-step camera movement?

[ankostis]

I have not touched xml content; i think though that you may find some help on its grammar in this PTZ-page of the notorious home-assistant.