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

bookie/src/app/core/customer.ts

@@ -0,0 +1,14 @@
+export class Customer {
+  id: string;
+  name: string;
+  phone: string;
+  address: string;
+
+  public constructor(init?: Partial<Customer>) {
+    this.id = '';
+    this.name = '';
+    this.phone = '';
+    this.address = '';
+    Object.assign(this, init);
+  }
+}