Update appdata description using text from the website About page.

packaging/linux/openra.appdata.xml

@@ -7,30 +7,21 @@
   <summary>Reimagining of early Westwood real-time strategy games</summary>
   <description>
     <p>
-      OpenRA is a Libre/Free Real Time Strategy project that recreates and reimagines
+      OpenRA is a project that recreates and modernizes the classic Command &amp; Conquer real time strategy games. We have developed a flexible open source game engine (the OpenRA engine) that provides a common platform for rebuilding and reimagining classic 2D and 2.5D RTS games (the OpenRA mods).
-      the classic Command &amp; Conquer titles.  The primary focus is cross-platform
-      multiplayer between Windows, OS X, and Linux; however, a growing number of the
-      original campaign missions are included, and there is support for skirmish games
-      against AI bots.
     </p>
     <p>
-      In a world where Hitler was assassinated and the Third Reich never existed,
+      The OpenRA mods include new features and gameplay improvements that bring them into the modern era:
-      the Soviet Union seeks power over all of Europe. Allied against this Evil Empire,
-      the free world faces a Cold War turned hot. The Red Alert mod fuses the quick
-      and fun gameplay of the original C&amp;C: Red Alert, with balance improvements
-      and new gameplay features inspired by modern RTS games.
     </p>
+    <ul>
+      <li>A choice between “right click” and classic “left click” control schemes</li>
+      <li>Overhauled sidebar interfaces for managing production</li>
+      <li>Support for game replays and an observer interface designed for streaming games online</li>
+      <li>The “fog of war” that obscures the battlefield outside your units' line of sight</li>
+      <li>Civilian structures that can be captured to provide benefits</li>
+      <li>Units gain experience as they fight and improve when they earn new ranks</li>
+    </ul>
     <p>
-      Join the Global Defense Initiative or the Brotherhood of Nod in our recreation of
+      OpenRA is 100% free, and comes bundled with three distinct mods. When you run a mod for the first time the game can automatically download the original game assets, or you can use the original game disks. 
-      the classic game that started it all! The Tiberian Dawn mod modernizes the original
-      Command &amp; Conquer gameplay by introducing features from later games, including
-      per-factory production queues, unit veterancy, and capturable tech structures.
-    </p>
-    <p>
-      Three great houses fight for the precious spice, melange. He who controls the spice
-      controls the universe! In the Dune 2000 mod you must establish a foothold on the
-      desert planet Arrakis, surviving its harsh environmental conditions while protecting
-      your harvesting operations from giant sandworms and ruthless enemy factions.
     </p>
   </description>
   <screenshots>