fix author affiliations
restructured scenario description in three sections
Restructure expectations scenario
Put Severin as first author
fix affiliations
Rewrite introduction to make our point clearer
Fixed again the affiliations ;-)

While here, ordered labs in alphabetical order
restructured scenario description in three sections
Again, rephrasing to hopefully make the whole message clear
start of other tack in related work
Rephrased RL to make clear that most of our conclusions could also be
relevant for USARSim work.
loose the dedicated related work section