Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/efun/function_exists b/doc/efun/function_exists
new file mode 100644
index 0000000..43f2da2
--- /dev/null
+++ b/doc/efun/function_exists
@@ -0,0 +1,14 @@
+SYNOPSIS
+ string function_exists(string str, object ob)
+
+DESCRIPTION
+ Return the file name of the object that defines the function
+ str in object ob. The returned value can be other than
+ object_name(ob) if the function is defined in an inherited
+ object. In !compat mode, the returned name always begins with a
+ '/' (absolute path). 0 is returned if the function was not
+ defined, or was defined as static (protected function on the
+ other hand are found).
+
+SEE ALSO
+ call_other(E), call_resolved(E), functionlist(E)