add helper method for applicationcontroller
add helper method for applicationcontroller
change page title
Add navbar
change home page: add links
let bootstrap support Asset Pipeline
Add Gem bootstrap
add  css for universal and logo
update home page  <p> to <div>
# the css class  hero-unit is important
use Partials to splite the application.html.erb
add schemafile
layout links
add user  resource
add contact action