WaterLineArtifact: Added callcontext-parameter to interfaces getWaterLine. Update all implementations. The change was done to be able to compute the extreme values during getWaterLine to access data needed in CrossSectionProfile Diagrams.

package de.intevation.flys.jfree;

/** Interface to say something is labelled. */
public interface HasLabel {
    public String getLabel();
    public void setLabel(String label);
}
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