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 aicontinue="GPS_Satellite_NASA_art-iif.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Bílaþrifbúnaður_bílasápa.jpg" timestamp="2016-06-04T20:26:44Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/9/9b/B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_b%C3%ADlas%C3%A1pa.jpg" descriptionurl="http://kvika.hssr.is/Mynd:B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_b%C3%ADlas%C3%A1pa.jpg" ns="6" title="Mynd:Bílaþrifbúnaður bílasápa.jpg" />
      <img name="Bílaþrifbúnaður_háþrýstidæla.jpg" timestamp="2016-06-04T20:29:07Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/4/4e/B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_h%C3%A1%C3%BEr%C3%BDstid%C3%A6la.jpg" descriptionurl="http://kvika.hssr.is/Mynd:B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_h%C3%A1%C3%BEr%C3%BDstid%C3%A6la.jpg" ns="6" title="Mynd:Bílaþrifbúnaður háþrýstidæla.jpg" />
      <img name="Bílaþrifbúnaður_inniþrif.jpg" timestamp="2016-06-04T20:27:17Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/2/22/B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_inni%C3%BErif.jpg" descriptionurl="http://kvika.hssr.is/Mynd:B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_inni%C3%BErif.jpg" ns="6" title="Mynd:Bílaþrifbúnaður inniþrif.jpg" />
      <img name="Bílaþrifbúnaður_tjöruhreinsir.jpg" timestamp="2016-06-04T20:28:01Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/4/40/B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_tj%C3%B6ruhreinsir.jpg" descriptionurl="http://kvika.hssr.is/Mynd:B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_tj%C3%B6ruhreinsir.jpg" ns="6" title="Mynd:Bílaþrifbúnaður tjöruhreinsir.jpg" />
      <img name="Bílaþrifbúnaður_í_tækjasal.jpg" timestamp="2016-06-04T20:21:46Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/d/dc/B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_%C3%AD_t%C3%A6kjasal.jpg" descriptionurl="http://kvika.hssr.is/Mynd:B%C3%ADla%C3%BErifb%C3%BAna%C3%B0ur_%C3%AD_t%C3%A6kjasal.jpg" ns="6" title="Mynd:Bílaþrifbúnaður í tækjasal.jpg" />
      <img name="D4h-add_to-type.png" timestamp="2015-11-11T10:08:12Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/8/8d/D4h-add_to-type.png" descriptionurl="http://kvika.hssr.is/Mynd:D4h-add_to-type.png" ns="6" title="Mynd:D4h-add to-type.png" />
      <img name="D4h-attendance.png" timestamp="2015-11-11T10:08:57Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/4/42/D4h-attendance.png" descriptionurl="http://kvika.hssr.is/Mynd:D4h-attendance.png" ns="6" title="Mynd:D4h-attendance.png" />
      <img name="D4h-quick_add-type.png" timestamp="2015-11-11T10:09:22Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/d/d5/D4h-quick_add-type.png" descriptionurl="http://kvika.hssr.is/Mynd:D4h-quick_add-type.png" ns="6" title="Mynd:D4h-quick add-type.png" />
      <img name="D4h-update_attendance.png" timestamp="2015-11-11T10:07:24Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/5/54/D4h-update_attendance.png" descriptionurl="http://kvika.hssr.is/Mynd:D4h-update_attendance.png" ns="6" title="Mynd:D4h-update attendance.png" />
      <img name="Dma-fossvogur.jpeg" timestamp="2015-03-10T00:29:12Z" url="http://kvika.hssr.is/mediawiki-1.23.5//images/6/68/Dma-fossvogur.jpeg" descriptionurl="http://kvika.hssr.is/Mynd:Dma-fossvogur.jpeg" ns="6" title="Mynd:Dma-fossvogur.jpeg" />
    </allimages>
  </query>
</api>