title: uninitialized constant Spreadsheet::Link - roo gem - xlsx file
body: <p>When I open a file in xlsx format, using empact/roo gem, this line of code:</p>
  
  <pre><code>data = Roo::Spreadsheet.open("/Users/asd/Desktop/in_xlsx.xlsx", extensions: :xlsx)
  </code></pre>
  
  <p>or this line</p>
  
  <pre><code>data = Roo::Excelx.new("/Users/asd/Desktop/in_xlsx.xlsx")
  </code></pre>
  
  <p>works perfect! (at least this is what I think)</p>
  
  <p><code>data</code> is now a <code>Roo::Excelx</code> object with the columns and rows filled correctly. </p>
  
  <p>But whenever I try to use a method like <code>data.first_row</code> or <code>data.cell(1,1)</code>, I get this</p>
  
  <pre><code>NameError: uninitialized constant Spreadsheet::Link
  from /Users/asd/.rvm/gems/ruby-2.0.0-p353@ch/gems/roo-1.13.2/lib/roo/excelx.rb:379:in `set_cell_values'
  </code></pre>
  
  <p>Additional info:</p>
  
  <ul>
  <li>MacOS 10.9.1</li>
  <li>Rails 4.0.2</li>
  <li>Ruby 2.0.0-p353</li>
  <li>Roo (1.13.2)</li>
  </ul>
  
  <p>Any help is really appreciated!</p>