Added public files

Roughly added all public files. Probably missed some, though.
diff --git a/doc/props/P_LIQUID b/doc/props/P_LIQUID
new file mode 100644
index 0000000..1631a8e
--- /dev/null
+++ b/doc/props/P_LIQUID
@@ -0,0 +1,8 @@
+NAME:
+    P_LIQUID                      "w_max_wasserfuellmenge"      
+
+DEFINIERT IN:
+    /sys/fishing.h
+
+BESCHREIBUNG:
+    *** KEINE BESCHREIBUNG VORHANDEN ***