GoogleMapsApiのsensorをfalseにする

Update:   app/views/layouts/application.html.erb
javascriptを使うので、htmlのformからactionとmethodを削除

Update:   app/views/plans/tabs/_route.html.erb
GoogleMapsApiのlibrariesでdirectionsを指定

Update:   app/views/layouts/application.html.erb
GoogleMapsApi Directionsにrequestを飛ばす

Update:   app/assets/javascripts/plans.js
Merge branch 'route_search_yota' into route_search