Rename service and port name
Fix PHP script syntax start errors
Change service identifier to org-kolibre-kados
Change encoding to iso-8859-1
Add more users for demo service
Make content appear in list new when returned

This feature is only for the demo service so that users don't run out of
content.
Add note about the service on the info page
Add service audio

Audio generated with command below
espeak -v en -w service.wav "kados demo service" && oggenc -Q --resample 44100 service.wav -o service.ogg
Inlude service audio label in getServiceAttributes response