link_thumbnail
==============

Helps you find thumbnail images for a given link, useful for adding context to
a shared URL. Lets you easily implement the "pick a thumbnail" functionality
from sharing a link on Facebook or Digg.

The approach to discovering an image is multi-tiered, in this order:
* OpenGraph
* oEmbed
  - thumbnail_url
  - "photo" type url
* microformats:
  - basically <img> with "photo" class
* semantic
  - leverages Readability


Usage / Quickstart
==================
In console:

    gem install link_thumbnail

In irb:

    require 'link_thumbnail'
    LinkThumbnail.thumbnail_url("http://example.com/a-post/") # => "http://example.com/images/relevant-image.jpg"


License (BSD)
=============
Copyright (c) 2011 Toby Matejovsky. All Rights Reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution.

3. The name of the author may not be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY [LICENSOR] "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.