GraphML importer doesn't import node labels data

Hi

I suggest following fix (see code snippet below) thus labels are recognized for GraphML files created by yEd (yworks.com).

Best Regards
Raymond

public class ImporterGraphML implements FileImporter, LongTask {
..
    public ImporterGraphML() {
        //Default node associations
        properties.addNodePropertyAssociation(NodeProperties.LABEL, "label");
        properties.addNodePropertyAssociation(NodeProperties.LABEL, "d3"); // Default node label used by yEd from yworks.com.
        properties.addNodePropertyAssociation(NodeProperties.X, "x");
        properties.addNodePropertyAssociation(NodeProperties.Y, "y");
        properties.addNodePropertyAssociation(NodeProperties.Z, "z");
        properties.addNodePropertyAssociation(NodeProperties.SIZE, "size");

        //Default edge associations
        properties.addEdgePropertyAssociation(EdgeProperties.LABEL, "label");
        properties.addEdgePropertyAssociation(EdgeProperties.LABEL, "edgelabel");
        properties.addEdgePropertyAssociation(EdgeProperties.LABEL, "d7"); // Default edge label used by yEd from yworks.com.
        properties.addEdgePropertyAssociation(EdgeProperties.WEIGHT, "weight");
        properties.addEdgePropertyAssociation(EdgeProperties.ID, "id");
        properties.addEdgePropertyAssociation(EdgeProperties.ID, "edgeid");
    }