the last window page can show content for the page layout
enable sidebar
add sidebar sub menu
define a global  constant  PAGE_TITLE_COUNT
 use global constant instead of the hard number
the first page is active as default
add gem will_paginate
implement the Pagination to survey activity
add sidebar sub menu and related setting
Merge branch 'dev_new_model' of github.com:IzzieLu/Icome into dev_new_model
rails g migration AddRolesToUsers role:string

rake db:migrate
add colunm role to users table