Make server_run usable as a module providing a wsgi-app
Make server_run usable as a module providing a wsgi-app

This enables us to pass `--mount /=scripts.server_run:app` to uwsgi.
arguments can then be passed using `--pyargv "--debug"` or similar.

agdsn/pycroft,agdsn/pycroft,agdsn/pycroft,agdsn/pycroft,agdsn/pycroft