facebook post: add linked_body
new linked_body module
use linked_caption for flickr posts
use body_attribute cattr_accessor with :send
string core extension
add basic autolink DSL
autolink as body for flickr post
add support for hashtag autolink
optimize into single regex
use activesupport concern for autolink module
show linked body on tweets view
Merge pull request #1 from sansari/steps

Implementation of all steps to completion from the talk.