Added public files

Roughly added all public files. Probably missed some, though.
diff --git a/doc/props/P_WEIGHT_PER_UNIT b/doc/props/P_WEIGHT_PER_UNIT
new file mode 100644
index 0000000..2796b7b
--- /dev/null
+++ b/doc/props/P_WEIGHT_PER_UNIT
@@ -0,0 +1,13 @@
+NAME:
+    P_WEIGHT_PER_UNIT             "weight_per_unit"             
+
+DEFINIERT IN:
+    /sys/properties.h
+
+BESCHREIBUNG:
+     Gewicht in Gramm pro Untereinheit.
+
+BEMERKUNGEN:
+     Deprecated. Bitte SetGramsPerUnits() (U_GPU) benutzen.
+
+25.Aug 2015 Gloinson