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>
    <allfileusages gafcontinue="Day_2_-_Dad_impersonating_an_alien.JPG" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1296" ns="6" title="File:CPU-bang-for-buck.png" />
      <page pageid="1350" ns="6" title="File:Day 1 - Alpen.JPG" />
      <page pageid="1351" ns="6" title="File:Day 1 - Kogen.JPG" />
      <page pageid="1352" ns="6" title="File:Day 1 - Most useless kettle ever invented.JPG" />
      <page pageid="1353" ns="6" title="File:Day 1 - Snoopy themed rubbish bin.JPG" />
      <page pageid="1354" ns="6" title="File:Day 1 - The snoopy themed bed covers.JPG" />
      <page pageid="1355" ns="6" title="File:Day 1 - The snoopy themed room.JPG" />
      <page pageid="1422" ns="6" title="File:Day 1 - The snoopy themed tissue box.jpg" />
      <page pageid="1357" ns="6" title="File:Day 1 - meeting area.JPG" />
      <page pageid="1358" ns="6" title="File:Day 2 - Alpen.JPG" />
    </pages>
  </query>
</api>