tinyprintf originally from http://www.sparetimelabs.com/tinyprintf/index.html
Copyright (C) 2004,2012  Kustaa Nyholm
Licenses: LGPL 2.1 or later (see LICENSE.LGPL-2.1)
      or  BSD-new           (see LICENSE.BSD-new)

"You are free to use the LGPL license [...] or the BSD license"