FileLoader: take into account role tags in kml files
FileLoader: take into account role tags in kml files

This fixes mars kml roles for placemarks

rku/marble,tzapzoor/marble,adraghici/marble,quannt24/marble,Earthwings/marble,tucnak/marble,Earthwings/marble,tucnak/marble,probonopd/marble,Earthwings/marble,quannt24/marble,rku/marble,oberluz/marble,tzapzoor/marble,oberluz/marble,quannt24/marble,tzapzoor/marble,rku/marble,rku/marble,tzapzoor/marble,rku/marble,David-Gil/marble-dev,AndreiDuma/marble,tzapzoor/marble,adraghici/marble,AndreiDuma/marble,utkuaydin/marble,quannt24/marble,probonopd/marble,quannt24/marble,quannt24/marble,rku/marble,utkuaydin/marble,oberluz/marble,adraghici/marble,adraghici/marble,tucnak/marble,AndreiDuma/marble,tucnak/marble,AndreiDuma/marble,probonopd/marble,oberluz/marble,probonopd/marble,David-Gil/marble-dev,AndreiDuma/marble,tucnak/marble,oberluz/marble,David-Gil/marble-dev,adraghici/marble,tzapzoor/marble,Earthwings/marble,tucnak/marble,probonopd/marble,adraghici/marble,AndreiDuma/marble,utkuaydin/marble,tucnak/marble,utkuaydin/marble,David-Gil/marble-dev,probonopd/marble,tzapzoor/marble,oberluz/marble,utkuaydin/marble,tzapzoor/marble,Earthwings/marble,Earthwings/marble,quannt24/marble,probonopd/marble,David-Gil/marble-dev,David-Gil/marble-dev,utkuaydin/marble