Added changelog for version 1.5.3.

Author: jlesage

appdefs.xml

@@ -102,6 +102,11 @@ section for more details.
   </documentation>
   <!-- Changelog of the application. -->
   <history>
+      <release>
+        <version>1.5.3</version>
+        <date>2018-01-19</date>
+        <change>Upgraded MakeMKV to version 1.10.10.</change>
+      </release>
       <release>
         <version>1.5.2</version>
         <date>2018-01-11</date>