(Optionally) Suppress non-critical logging to standard output

[senorcarbone]

Every simulation run yields something like the following to std output console. It would be nice to remove or give the option to suppress them maybe

AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.Kompics is exception
AuxClass: org.apache.log4j.PropertyConfigurator is exception
AuxClass: se.sics.kompics.Kompics is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception
AuxClass: se.sics.kompics.simulator.core.impl.P2pSimulator is exception