Added note about what Elli does different than the other servers.
Added note about what Elli does different than the other servers.

K2InformaticsGmbH/elli,knutin/elli,elli-lib/elli,K2InformaticsGmbH/elli,tsloughter/elli,odo/elli,elli-lib/elli,tsloughter/elli,odo/elli,knutin/elli