You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaicontinue="20131122-chimay-doree_goud.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="4937" ns="6" title="File:20131101-nils oscar-hop yard ipa.jpg" />
      <page pageid="4938" ns="6" title="File:20131102-lagunitas-hop stoopid ale.jpg" />
      <page pageid="4939" ns="6" title="File:20131102-sjal.jpg" />
      <page pageid="4942" ns="6" title="File:20131103-samuel adams-boston lager.jpg" />
      <page pageid="4943" ns="6" title="File:20131108-nils oscar-smof-jubelol.jpg" />
      <page pageid="4945" ns="6" title="File:20131109-st eriks-svenska smakar 3.jpg" />
      <page pageid="4944" ns="6" title="File:20131110-brew dog-golding single hop ipa.jpg" />
      <page pageid="4947" ns="6" title="File:20131115-brew dog-waimea single hop ipa.jpg" />
      <page pageid="4948" ns="6" title="File:20131116-robinsons-trooper.jpg" />
      <page pageid="4949" ns="6" title="File:20131117-brew dog-dana single hop ipa.jpg" />
    </pages>
  </query>
</api>
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