Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/sefun/set_light b/doc/sefun/set_light
new file mode 100644
index 0000000..62390c4
--- /dev/null
+++ b/doc/sefun/set_light
@@ -0,0 +1,17 @@
+SYNOPSIS:
+ int set_light(int n)
+
+DESCRIPTION:
+ An object is by default dark. It can be set to not dark by
+ calling set_light(1). The environment will then also get this
+ light. The returned value is the total number of lights in
+ this room. So if you call set_light(0) it will return the
+ light level of the current object.
+
+ Note that the value of the argument is added to the light of
+ the current object.
+
+BUGS:
+ This handling of light by the parser is inappropriate for most
+ purposes: If you put a burning candle into a safe, the safe
+ will start to emit light.