Added changelog for version 1.9.3.

Author: jlesage

appdefs.xml

@@ -136,6 +136,13 @@ section for more details.
   </documentation>
   <!-- Changelog of the application. -->
   <history>
+      <release>
+        <version>1.9.3</version>
+        <date>2018-09-18</date>
+        <change>Now using baseimage v3.5.1, which brings the following changes:</change>
+        <change level="2">Updated installed packages to get latest security fixes.</change>
+        <change>During container startup, make sure the MakeMKV data directory is set to the correct value.</change>
+      </release>
       <release>
         <version>1.9.2</version>
         <date>2018-08-20</date>