title: Extract text from PDF(I have link to PDF) in ruby
body: <p>I have a link like</p>
  
  <pre><code>      http://www.downloads.com/help.pdf
  </code></pre>
  
  <p>I want to download this, and parse it to get the text content.</p>
  
  <p>How do I go about this? I also plan to tag-ize(if there is a word like that) the extracted text</p>