Change title
Add s3_file_field gem
Set up s3_file_field
Add optional hash_name
Rewrite seeds.rb by reading csv
Set style
Add simple_enum gem
Add format
Add format
Update gems
Add form for format_cd column
Adjust style
Remove content column in post#index
Set order by published_at
Special treat for root page
Update content
Remove twitter bootstrap
Update content except letter info archive
Add content of letter
rails g scaffold Upload post:references category name url --skip-assets --skip-helper --skip-stylesheets --skip-view-specs --skip-controller-specs --skip-routing-specs --skip-request-specs