fix new item links and sidebar's links
fix "show you" badge for non login user on users#show
fix action buttons such as stock and follow
fix edit links on items#show
fix comment btn's message
fix style colors
add close botton in alert area
fix alert styles
make success style of 'post new item botton'
disable new comment form unless logged in
fix sidebars
user page-header class
define default order for Tag#items
define User#items and User#stocks default order
define Item#comments default order
order items by updated_at at items#index
define 'has many users' relations order
use human friendlly sort instead of Model.all
fix global sidebar