Library material was added

StructureHelperLogics/Models/Materials/IHeadMaterial.cs

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+using StructureHelperLogics.Models.Materials;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+
+namespace StructureHelper.Models.Materials
+{
+    public interface IHeadMaterial : ICloneable
+    {
+        string Name { get; set; }
+        Color Color { get; set; }
+        IHelperMaterial HelperMaterial { get; set; }
+        //MaterialDefinitionBase Material { get; set; }
+    }
+}