add sound files

...

 Changes to be committed:
	new file:   data/sounds/notifications/ogg/Aldebaran.ogg
	new file:   data/sounds/notifications/ogg/Canopus.ogg
	new file:   data/sounds/notifications/ogg/Castor.ogg
	new file:   data/sounds/notifications/ogg/Electra.ogg
	new file:   data/sounds/notifications/ogg/Fomalhaut.ogg
	new file:   data/sounds/notifications/ogg/Merope.ogg
	new file:   data/sounds/notifications/ogg/Regulus.ogg
	new file:   data/sounds/notifications/ogg/Sirius.ogg
	new file:   data/sounds/notifications/ogg/Sirrah.ogg