Greek translation revisited

inc/lang/el/admin.txt

inc/lang/el/adminplugins.txt

inc/lang/el/conflict.txt

inc/lang/el/denied.txt

inc/lang/el/draft.txt

inc/lang/el/edit.txt

inc/lang/el/index.txt

inc/lang/el/install.html

inc/lang/el/lang.php

inc/lang/el/locked.txt

inc/lang/el/login.txt

inc/lang/el/newpage.txt

inc/lang/el/norev.txt

inc/lang/el/password.txt

inc/lang/el/preview.txt

inc/lang/el/pwconfirm.txt

inc/lang/el/read.txt

inc/lang/el/recent.txt

inc/lang/el/register.txt

inc/lang/el/registermail.txt