add riot-route & sample

[ampcpmgp]

app.jsに以下を忘れずに行う

import 'babel-polyfill'
import riot from 'riot'
import route from 'riot-route'
import 'normalize.css'
import './main.css'
import './app/root.tag'

route.base('/')
riot.mount('app-root')
route.exec()