- base classes aren't much of a base anymore
- AVB is now a qobject deriving pulseobject
- Streambase and devicebase derive AVB rather than AVB and pulseobject
- all objects types got q_properties
- models do no longer replicate all properties as roles instead they return
  pointers to the actual objects
- streambase and devicebase are no longer template classes, instead their
  data setting function is a template now. this was necessary to make them
  qobject with properties to avoid property declaration problems in
  the derivates
- the setInfo functions are now update() for concrete classes and
  updateFoo() for base classes; derivates call their parents update to
  separate data setting into their respective relevant base class
- due to former point base classes update functions continue to be
  templates and cannot be virtual for that very reason (much sad :'<)
- kcm and applet sources have been largely adapted except for inactive code
  paths
- generic template functions of context moved to the header to make way
  for the eventual removal of their concrete frontend functions