[WIP] Add in TODO.org item about settings migrator scripts

* Add item in TODO.org about settings migrator
* Add item about crossplatform Makefile build
* Wrote perl-stub for settings export
* Wrote GO-stub for settings import

cmd/settings-migrator/exporter.pl

@@ -0,0 +1,14 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use English;
+use utf8;
+
+use JSON::XS qw (encode_json);
+
+# FIXME: написать настоящий экспортёр настроек!
+print "Hello world!\n";
+
+# vim: set ft=perl noet ai ts=4 sw=4 sts=4: