Amount of effort required:
* small
** medium
*** large

Implement missing APIs:
org.ofono.AssistedSatelliteNavigation and org.ofono.PositioningRequestAgent **
org.ofono.AudioSettings * 
org.ofono.CallMeter * (class implementation exists, but lots of missing
stuff)
org.ofono.cdma.ConnectionManager **
org.ofono.cdma.MessageManager ***
org.ofono.cdma.NetworkRegistration **
org.ofono.cdma.VoiceCallManager **
org.ofono.CellBroadcast **
org.ofono.LocationReporting *
org.ofono.PushNotification and org.ofono.PushNotificationAgent **
org.ofono.SmartMessaging and org.ofono.SmartMessagingAgent **
org.ofono.SimToolkit and org.ofono.SimToolkitAgent ***
org.ofono.TextTelephony *
Call History - that seems to be a separately available plugin and I can't
find where it is.

More formal "certification" of ofono-qt to specific ofono versions
 - the versioning should match ofono's
 - when new version of ofono is out, diff of ofono/doc/* can serve
   as a list of things to fix