add a size function which returns the number of contained placemarks (or something like that)
add a size function which returns the number of contained placemarks (or something like that)

svn path=/branches/work/marble-geodata-nt/marble/; revision=933048

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