ParserXML: fix bugs with Comparison parsing
Model: sleep added to MainLoop. modelIterationTick  now is considered
SADcore.Comparison: sign taking into account now
SADcore.Action: Arguments comparing added and condition take into account in Action.Perform
 -- TODO: code Perform function -- done
SADcore.Agent: HE CAN MOVE!!!!! HE CAN MOVE!!!!!
 -- also here printed some info now. Must be not here.