嵌套路由

用单页去实现多页应用，复杂的嵌套路由

{
	name:'music', path:'/music', component:Music, children:[
    { name:'music.oumei', path:'oumei', component:Oumei },
    { name:'music.guochan', path:'guochan', component:Guochan }   
  ]
}