Update README and LICENCE

LICENSE

-Greek translation for question2answer.
-Copyright (C) 2013-15 Foivos S. Zakkak
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

README.md

-qa-lang-el
-==========
+# question2answer-lang-el
 
-question2answer Greek translation
----------------------------------
+Greek language pack for [Question2Answer](https://www.question2answer.org/) (Q2A) version 1.8.x
+Tested version: 1.8.6
+
+## Installation
+- Download the contents of this repository and place them in a new folder named `qa-lang/el`, in your question2answer installation.
+- In the admin section of question2answer, you can now select the Greek language (Ελληνικά).
+
+## Credits
+- Based on [previous translation](https://github.com/zakkak/qa-lang-el) by [Foivos Zakkak](http://foivos.zakkak.net/) for 1.7 and previous. Copyright (C) 2013-15 Foivos S. Zakkak.
+- Additions for 1.8 by [Sotiris Kanellopoulos](mailto:sotkanel@yahoo.gr).
+- Maintained by [Nikos Papaspyrou](https://www.softlab.ntua.gr/~nickie/).