Added public files

Roughly added all public files. Probably missed some, though.
diff --git a/doc/props/P_SCREENSIZE b/doc/props/P_SCREENSIZE
new file mode 100644
index 0000000..fc9dd15
--- /dev/null
+++ b/doc/props/P_SCREENSIZE
@@ -0,0 +1,8 @@
+NAME:
+    P_SCREENSIZE                  "screensize"                  
+
+DEFINIERT IN:
+    /sys/player/base.h
+
+BESCHREIBUNG:
+     Bildschirmgroesse in Zeilen (fuer More)