Prepare MesserLab/SLiM sources for general Flatpak release

SLiM.spec

@@ -113,6 +113,9 @@ update-mime-database -n /usr/share/mime/
 xdg-mime install --mode system /usr/share/mime/packages/org.messerlab.slimgui-mime.xml
 
 %changelog
+* Tue Sep 13 2022 Ben Haller <bhaller@mac.com> - 4.0.1-1
+- Final candidate 1 for 4.0.1 release
+
 * Tue Aug 23 2022 Bryce Carson <bryce.a.carson@gmail.com> - 4.0-2
 - Include new changelog entry to identify the date of the new release
 

org.messerlab.slimgui.appdata.xml

@@ -13,7 +13,7 @@
   </description>
   <screenshots>
     <screenshot type="default">
-        <image>https://raw.githubusercontent.com/bryce-carson/SLiM/ab1a982d6f6238d1702cd6a146b4b90019a566d4/org.messerlab.slimgui.screenshot.png</image>
+        <image type="source">https://raw.githubusercontent.com/MesserLab/SLiM/master/org.messerlab.slimgui.screenshot.png</image>
     </screenshot>
   </screenshots>
   <!-- LINKS to display in "Software Center" applications-->

org.messerlab.slimgui.metainfo.xml

@@ -17,11 +17,15 @@
   <launchable type="desktop-id">org.messerlab.slimgui.desktop</launchable>
   <screenshots>
       <screenshot type="default">
-          <image>https://raw.githubusercontent.com/bryce-carson/SLiM/ab1a982d6f6238d1702cd6a146b4b90019a566d4/org.messerlab.slimgui.screenshot.png</image>
+          <image type="source">https://raw.githubusercontent.com/MesserLab/SLiM/master/org.messerlab.slimgui.screenshot.png</image>
       </screenshot>
   </screenshots>
   <!-- LINKS to display in "Software Center" applications-->
   <url type="bugtracker">https://github.com/MesserLab/SLiM/issues</url>
   <url type="homepage">https://messerlab.org/slim/</url>
   <developer_name>Ben Haller</developer_name>
+  <content_rating type="oars-1.0" />
+  <releases>
+    <release version="v4.0.1" date="2022-09-13" type="stable"/>
+</releases>
 </component>