message: add alert method to fab component
diff: @@ -5,4 +5,10 @@ import {Component} from '@angular/core'
  templateUrl: 'fab-menu-demo.component.html',
  styleUrls: ['fab-menu-demo.component.scss']
  })
  -export class FabMenuDemo {}
  +export class FabMenuDemo {
  +
  + alert(msg: string){
  + console.log(msg);
  + }
  +
  +}
  