invert dependency for route responders
Merge branch 'express-invert-dependencies'
respect that server is started and stopped asynchronously
Merge branch 'async-start-stop'
Merge remote-tracking branch 'swk/master'

Conflicts:
	lib/app.js
invert express dependency for gruppenverwaltung
Merge pull request #8 from ggramlich/master

invert dependencies for express, mind that server is started and stopped asynchronously in the smoke test