Add the German card game "Skat" by Gunter Gerhardt (http://www.xskat.de/android.html).

metadata/de.xskat.txt

@@ -0,0 +1,32 @@
+Categories:Games
+License:XSkat
+Author Name:Gunter Gerhardt
+Web Site:http://www.xskat.de/android.html
+Source Code:https://github.com/rnauber/xskat-android/
+Issue Tracker:
+
+Summary:Play famous German card game Skat
+Description:
+This is the famous German card game "Skat" by Gunter Gerhardt.
+
+Features:
+
+* Single player mode.
+* Game lists and logs.
+* English or German text.
+* German or French suited cards.
+* Selectable playing strength.
+* Variations: Ramsch, Kontra & Re.
+* Game hints and replay.
+.
+
+Repo Type:git
+Repo:https://github.com/rnauber/xskat-android.git
+
+Build:1.4.fdroid,14
+    commit=v1.4
+    subdir=app
+    gradle=yes
+
+Auto Update Mode:Version v%v
+Update Check Mode:Tags