implemented sample references

src/app/models/material.model.ts

@@ -7,21 +7,10 @@ export class MaterialModel extends BaseModel {
   name = '';
   supplier = '';
   group = '';
-  mineral = 0;
-  glass_fiber = 0;
-  carbon_fiber = 0;
-  private numberTemplate = {color: '', number: ''};
-  numbers: {color: string, number: string}[] = [_.cloneDeep(this.numberTemplate)];
+  properties: {material_template: string, [prop: string]: string} = {material_template: null};
+  numbers: string[] = [''];
 
   sendFormat() {
-    return _.pick(this, ['name', 'supplier', 'group', 'mineral', 'glass_fiber', 'carbon_fiber', 'numbers']);
-  }
-
-  addNumber() {
-    this.numbers.push(_.cloneDeep(this.numberTemplate));
-  }
-
-  popNumber() {
-    this.numbers.pop();
+    return _.pick(this, ['name', 'supplier', 'group', 'numbers', 'properties']);
   }
 }