Added function to expand super-ray labels

in order to allow super-ray overlap

expandLabel.m

+function Ref = expandLabel(Ref,se)
+%EXPANDLABEL Summary of this function goes here
+%   Detailed explanation goes here
+
+[Offset,Color,Label] = SR.SetToFields(Ref);
+
+numLab = numel(Label);
+
+for lab = 1:numLab
+    M = imdilate(Label{lab}==lab,se) & Label{lab}~=0;% & ~isnan(Label{lab});
+    Label{lab}(M) = lab;
+end
+
+Ref = SR.FieldsToSet(Offset,Color,Label);
+
+end
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