[i18n] Horde Greek Translation update

[Limperis Antonis]

Hello friends,

You find in https://www.dropbox.com/l/s/rTdNKjKyrOZQJ6bUH0rAet
 a  new Greek translation for Horde Groupware Webmail Edition 5.2.12

I suggest to include these translation in the official distribution of horde Groupware Webmail Edition  applications.

Thanks
Antonis Limperis,
Greek School Network
limperis at cti.gr