Feature: Added the customer module to list / edit customers. This is needed to add the customer discount functionality

bookie/src/app/home/home.component.html

@@ -17,6 +17,15 @@
   >
     <h3 class="item-name">Sales</h3>
   </mat-card>
+  <mat-card
+    fxLayout="column"
+    class="square-button"
+    matRipple
+    *ngIf="auth.allowed('customers')"
+    [routerLink]="['/', 'customers']"
+  >
+    <h3 class="item-name">Customers</h3>
+  </mat-card>
 </div>
 <div fxLayout="row wrap" fxLayoutGap="grid 20px">
   <mat-card