title: Cannot get iban from camt_parser rails gem
body: <p>I just installed the camt_parser gem (<a href="https://github.com/Barzahlen/camt_parser" rel="nofollow noreferrer">https://github.com/Barzahlen/camt_parser</a>)</p>
  
  <p>With the following test program, no way to get the iban out of the substructre "transactions" from the structure "entry" from the structure "statement"</p>
  
  <p>I get the following error:</p>
  
  <pre><code>in `block (2 levels) in &lt;main&gt;': undefined method `iban' for #&lt;Array:0x007f9003a2ce30&gt; (NoMethodError)
  </code></pre>
  
  <p>In the code I see that this class has a field called iban</p>
  
  <p>Here is the code</p>
  
  <pre><code>require 'camt_parser'
  camt = CamtParser::File.parse 'myCamt.xml'
  camt.statements.each do |statement|
  
      statement.entries.each do |entry|
       # Access individual entries/bank transfers
       puts entry.description
       puts entry.debit
       puts entry.transactions.iban
      end
  
  end
  </code></pre>
  
  <p>Thanks a lot guys!</p>