添加article controller 以及model ,后台页面.etc
add ckeditor and some views
add columns controller and model.
article state change
the header for home layout
page css and add channel/column model
add blogrolls
some css style changed.
some css style changed.
some change
replace acts_as_taggble to normal association(has_many|belongs_to) between channel model and column model.
chosen-rails  multiple chosen for culomns.
remove acts_as_taggable_on gem.
accomplish the association between article and column ,many to many.
list articles for defferent column
add default_scope for article model (created_at DESC).
add kaminari gem
modify css for pagination show.
add client_side_validations gem.
column validation and add gem 'sunspot_rails'.