festival voices

had to try some different voices with festival, since the default one on the acer aspire sounded terrible. kal is the default on gentoo, and is the one i'm most used to. ked sounds pretty good, too; maybe i'll use it when it want to differentiate. both of these are diphone voices. all the arctic voices i listened to sounded pretty bad. to switch between them globally, just put (set! voice_default 'voice_kal_diphone) into /etc/festival/siteinit.scm