move README content to Makefile

It's not necessary to copy commands from README anymore. Just use
'make source_list', 'make template' or 'make locales'.

<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot xmlns:xsd="http://www.w3.org/2001/XMLSchema" URI_location="LOCAL://">
  <TargetType/>
</BeremizRoot>