add greek letters to cantarell fonts

[Petros F <petrosfreris gmail com>]

Hello, i'm Petros and i'm from Greece.
There is a problem with greek letters with Gnome, so i want to help fix it.

I'm not a graphics designer so i don't know how to make it on my own, but i can help on designing the letters.

Are there anyone who knows how to make fonts?

Petros