Feature/app status

@arnehilmann 
@esc 
@locolupo 

Feel free to look at the code already, it's still a bit rough around the edges but a review would be welcome
Yes, I thought about that. But Jinja2 is a big dependency and a nightmare
on RHEL (there is a 3 years old version there or so).

I'm not sure if it's worth it or not. Agree about the template loop logic
being much cleaner.