Updated version info and description

org.zdoom.GZDoom.appdata.xml

@@ -7,12 +7,15 @@
   <summary>Classic first-person-shooter engine for all classical Id games</summary>
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0</project_license>
+
   <developer_name>ZDoom team</developer_name>
+  <update_contact>gnome@kevindegeling.nl</update_contact>
 
   <url type="homepage">https://zdoom.org/index</url>
   <url type="bugtracker">https://github.com/coelckers/gzdoom</url>
   <url type="help">https://zdoom.org/wiki/Main_Page</url>
   <url type="faq">https://zdoom.org/about</url>
+  <url type="contact">https://forum.zdoom.org/</url>
 
   <launchable type="desktop-id">org.zdoom.GZDoom.desktop</launchable>
 
@@ -27,22 +30,25 @@
       Experience mind-bending user-created mods, made possible by ZDoom's advanced mapping features and the new ZScript language. Or make a mod of your own! 
     </p>
     <ul>    
-      <li>Can play all Doom engine games, including Ultimate Doom, Doom II, Heretic, Hexen, Strife, and more.</li>
+      <li>Can play all Doom engine games, including Ultimate Doom, Doom II, Heretic, Hexen, Strife, and more</li>
       <li>Supports all the editing features of Hexen. (ACS, hubs, new map format, etc.)</li>
-      <li>Supports most of the Boom editing features.</li>
+      <li>Supports most of the Boom editing features</li>
-      <li>Features complete translations of Doom, Heretic, Hexen, Strife and other games into over ten different languages with Unicode support for Latin, Cyrillic, and Hangul so far.   </li>
+      <li>Features complete translations of Doom, Heretic, Hexen, Strife and other games into over ten different languages with Unicode support for Latin, Cyrillic, and Hangul so far</li>
-      <li>All Doom limits are gone.</li>
+      <li>All Doom limits are gone</li>
-      <li>Several softsynths for MUS and MIDI playback, including an OPL softsynth for an authentic “oldschool” flavor.</li>
+      <li>Several softsynths for MUS and MIDI playback, including an OPL softsynth for an authentic “oldschool” flavor</li>
-      <li>High resolutions.</li>
+      <li>High resolutions</li>
-      <li>Quake-style console and key bindings.</li>
+      <li>Quake-style console and key bindings</li>
-      <li>Crosshairs.</li>
+      <li>Crosshairs</li>
-      <li>Free look (look up/down).</li>
+      <li>Free look (look up/down)</li>
-      <li>Jumping, crouching, swimming, and flying.</li>
+      <li>Jumping, crouching, swimming, and flying</li>
-      <li>Full-featured joystick/gamepad support under Windows.</li>
+      <li>Full-featured joystick/gamepad support under Windows</li>
-      <li>Up to 8 player network games using UDP/IP, including team-based gameplay.</li>
+      <li>Up to 8 player network games using UDP/IP, including team-based gameplay</li>
-      <li>Support for the Bloodbath announcer from the classic Monolith game Blood.</li>
+      <li>Support for the Bloodbath announcer from the classic Monolith game Blood</li>
-      <li>Walk over/under monsters and other things.</li>
+      <li>Walk over/under monsters and other things</li>
     </ul>
+    <p>
+      Commercial data files are required to run the supported games. For more info about all supported games and their data files, see: <code>https://zdoom.org/wiki/IWAD</code> for more info. Shareware versions will not work.
+    </p>
   </description>
 
   <screenshots>
@@ -65,6 +71,11 @@
   </screenshots>
 
   <releases>
+    <release version="4.2.1" date="2019-09-11">
+      <description>
+        <p>Updated release package to GZDoom 4.2.1 and made many minor changes for Flathub.</p>
+      </description>
+    </release>
     <release version="4.2.0" date="2019-09-10">
       <description>
         <p>First release of GZDoom on Flatpak.</p>