terminology: upgrade to 0.5.1

* announcement:
  https://phab.enlightenment.org/phame/post/view/57/


* LIC_FILES_CHKSUM change is just Copyright year update:
  < Copyright (C) 2012-2014 Carsten Haitzler and various contributors (see AUTHORS)
  ---
  > Copyright (C) 2012-2012 Carsten Haitzler and various contributors (see AUTHORS)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>