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="20160627124206|Opitz.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="20150708MST_0130.jpg" timestamp="2016-06-30T07:05:20Z" user="Faber" url="https://fusion2016.org/images/f/f0/20150708MST_0130.jpg" descriptionurl="https://fusion2016.org/File:20150708MST_0130.jpg" ns="6" title="File:20150708MST 0130.jpg" />
      <img name="160628_Fusion_Gewinnspiel_Flyer_A5_V2.pdf" timestamp="2016-06-30T07:04:05Z" user="Faber" url="https://fusion2016.org/images/9/90/160628_Fusion_Gewinnspiel_Flyer_A5_V2.pdf" descriptionurl="https://fusion2016.org/File:160628_Fusion_Gewinnspiel_Flyer_A5_V2.pdf" ns="6" title="File:160628 Fusion Gewinnspiel Flyer A5 V2.pdf" />
      <img name="Time_Table_July_7_2016.svg" timestamp="2016-06-29T11:28:09Z" user="Faber" url="https://fusion2016.org/images/b/b2/Time_Table_July_7_2016.svg" descriptionurl="https://fusion2016.org/File:Time_Table_July_7_2016.svg" ns="6" title="File:Time Table July 7 2016.svg" />
      <img name="Time_Table_July_7_2016.png" timestamp="2016-06-29T11:23:38Z" user="Faber" url="https://fusion2016.org/images/8/89/Time_Table_July_7_2016.png" descriptionurl="https://fusion2016.org/File:Time_Table_July_7_2016.png" ns="6" title="File:Time Table July 7 2016.png" />
      <img name="Time-Table-July-7-2016.png" timestamp="2016-06-29T11:21:24Z" user="Faber" url="https://fusion2016.org/images/4/41/Time-Table-July-7-2016.png" descriptionurl="https://fusion2016.org/File:Time-Table-July-7-2016.png" ns="6" title="File:Time-Table-July-7-2016.png" />
      <img name="VDE_Logo_4c.png" timestamp="2016-06-29T08:22:54Z" user="Faber" url="https://fusion2016.org/images/b/b7/VDE_Logo_4c.png" descriptionurl="https://fusion2016.org/File:VDE_Logo_4c.png" ns="6" title="File:VDE Logo 4c.png" />
      <img name="Badge_ios.png" timestamp="2016-06-28T08:55:36Z" user="Faber" url="https://fusion2016.org/images/c/c8/Badge_ios.png" descriptionurl="https://fusion2016.org/File:Badge_ios.png" ns="6" title="File:Badge ios.png" />
      <img name="Badge_android.png" timestamp="2016-06-28T08:55:29Z" user="Faber" url="https://fusion2016.org/images/0/0d/Badge_android.png" descriptionurl="https://fusion2016.org/File:Badge_android.png" ns="6" title="File:Badge android.png" />
      <img name="Qrcode.svg" timestamp="2016-06-28T08:46:34Z" user="Faber" url="https://fusion2016.org/images/a/a2/Qrcode.svg" descriptionurl="https://fusion2016.org/File:Qrcode.svg" ns="6" title="File:Qrcode.svg" />
      <img name="Qrcode.png" timestamp="2016-06-28T08:41:01Z" user="Faber" url="https://fusion2016.org/images/b/b5/Qrcode.png" descriptionurl="https://fusion2016.org/File:Qrcode.png" ns="6" title="File:Qrcode.png" />
    </allimages>
  </query>
</api>