Added public files

Roughly added all public files. Probably missed some, though.
diff --git a/doc/master/preload b/doc/master/preload
new file mode 100644
index 0000000..95f27d7
--- /dev/null
+++ b/doc/master/preload
@@ -0,0 +1,18 @@
+SYNOPSIS
+	void preload(string file)
+
+DESCRIPTION
+	Load the object with the given file name, that was returned by
+	epilog(). It is task of the epilog()/preload() pair to ensure
+	the validity of the given strings (e.g. filtering out comments
+	and blank lines). For preload itself a call_other(file, "???")
+	s sufficient, but it should be guarded by a catch() to avoid
+	premature blockings. Also it is wise to change the master's
+	euid from root_uid to something less privileged for the time
+	of the preload.
+
+	You can of course do anything else with the passed strings -
+	preloading is just the traditional task.
+
+SEE ALSO
+	epilog(M), master(M)