Changes file details based on feedback

org.zdoom.GZDoom.appdata.xml

@@ -48,21 +48,30 @@
   <screenshots>
     <screenshot type="default">
       <image>https://i.imgur.com/d8vMYY6.png</image>
-      <caption>Strife</caption>
+      <caption>Strife screenshot</caption>
     </screenshot>
     <screenshot>
       <image>https://i.imgur.com/lQ1BYlZ.png</image>
-      <caption>Doom</caption>
+      <caption>Doom screenshot</caption>
     </screenshot>
     <screenshot>
       <image>https://i.imgur.com/dgtcHbc.png</image>
-      <caption>Heretic</caption>
+      <caption>Heretic screenshot</caption>
     </screenshot>
     <screenshot>
       <image>https://i.imgur.com/u5Wb5pw.png</image>
-      <caption>Hexen</caption>
+      <caption>Hexen screenshot</caption>
     </screenshot>
   </screenshots>
+
+  <releases>
+    <release version="4.2.0" date="2019-09-10">
+      <description>
+        <p>First release of GZDoom on Flatpak.</p>
+      </description>
+    </release>
+  </releases>
+
   <content_rating type="oars-1.1">
     <!--
 	  Violence is tricky: You could argue that by 2019 standards, it's cartoonish.

org.zdoom.GZDoom.desktop

@@ -2,7 +2,7 @@
 Categories=Games;
 Comment=Multi-game launcher for Doom era games
 Exec=gzdoom
-Icon=gzdoom.png
+Icon=org.zdoom.GZDoom.png
 Name=GZDoom
 StartupNotify=true
 Terminal=false

org.zdoom.GZDoom.yaml

@@ -3,7 +3,6 @@ runtime: org.gnome.Platform
 sdk: org.gnome.Sdk
 runtime-version: "3.32"
 command: gzdoom.sh
-rename-icon: gzdoom
 
 finish-args:
 - --device=dri
@@ -98,11 +97,11 @@ modules:
   - type: file
     path: org.zdoom.GZDoom.appdata.xml
   - type: file
-    path: gzdoom.png
+    path: org.zdoom.GZDoom.png
   build-commands:
   - install -D gzdoom.sh /app/bin/gzdoom.sh
   - install -Dm 644 org.zdoom.GZDoom.desktop -t /app/share/applications
-  - install -Dm 644 org.zdoom.GZDoom.appdata.xml -t /app/share/appdata
-  - install -Dm 644 gzdoom.png /app/share/icons/hicolor/48x48/apps/gzdoom.png
-  - install -Dm 644 gzdoom.png /app/share/icons/hicolor/64x64/apps/gzdoom.png
-  - install -Dm 644 gzdoom.png /app/share/icons/hicolor/128x128/apps/gzdoom.png
+  - install -Dm 644 org.zdoom.GZDoom.appdata.xml -t /app/share/metainfo
+  - install -Dm 644 org.zdoom.GZDoom.png /app/share/icons/hicolor/48x48/apps/org.zdoom.GZDoom.png
+  - install -Dm 644 org.zdoom.GZDoom.png /app/share/icons/hicolor/64x64/apps/org.zdoom.GZDoom.png
+  - install -Dm 644 org.zdoom.GZDoom.png /app/share/icons/hicolor/128x128/apps/org.zdoom.GZDoom.png