Feature: The guestbook now autocompletes on phone number

bookie/src/app/guest-book/customer.ts

@@ -0,0 +1,12 @@
+export class Customer {
+  name: string;
+  phone: string;
+  address: string;
+
+  public constructor(init?: Partial<Customer>) {
+    this.name = '';
+    this.phone = '';
+    this.address = '';
+    Object.assign(this, init);
+  }
+}