Added changelog for version 1.10.4.

Author: jlesage

appdefs.xml

@@ -136,6 +136,12 @@ section for more details.
   </documentation>
   <!-- Changelog of the application. -->
   <history>
+      <release>
+        <version>1.10.4</version>
+        <date>2018-12-03</date>
+        <change>Upgraded MakeMKV to version 1.14.2.</change>
+        <change>Added ccextractor, needed to extract closed captions.</change>
+      </release>
       <release>
         <version>1.10.3</version>
         <date>2018-11-13</date>