title: Change WhiteOctober TCPDF bundle configuration values
body: <p>I've started using the WhiteOctober TCPDF bundle in my symfony project but I can't figure out how to change the default configuration values, such as page format. I've tried putting that in my config.yml:</p>
  
  <pre><code>white_october_tcpdf:
      tcpdf:
          k_tcpdf_external_config: true
          pdf_page_format: 'LETTER'
          pdf_author: 'Company Name'
          pdf_header_title: 'Order Confirmation'
          pdf_header_string: 'Company Name'
          pdf_header_logo: '%kernel.root_dir%/../web/images/logo.png'
          pdf_header_logo_width: '35'
          pdf_margin_header: 15
          pdf_margin_footer: 15
          pdf_margin_top: 25
          pdf_margin_bottom: 25
          pdf_margin_left: 25
          pdf_margin_right: 25
  </code></pre>
  
  <p>but they are totally ignored when calling</p>
  
  <pre><code>$pdf = $this-&gt;get('white_october.tcpdf')-&gt;create();
  </code></pre>
  
  <p>in my controller. The generated PDF is still in A4 with no header and defaults margins.</p>
  
  <p>Am I missing something to make the bundle take my custom configuration?</p>