Added public files

Roughly added all public files. Probably missed some, though.
diff --git a/doc/master/valid_snoop b/doc/master/valid_snoop
new file mode 100644
index 0000000..5bff987
--- /dev/null
+++ b/doc/master/valid_snoop
@@ -0,0 +1,8 @@
+SYNOPSIS
+	int valid_snoop(object me, object you)
+
+DESCRIPTION
+	Should return 1 if me is allowed to snoop you, 0 if not.
+
+SEE ALSO
+	snoop(E), query_snoop(E), valid_query_snoop(M)