* Added a 'RDMatrix::id()' method.
* Added 'RDIconEngine::Switcher', 'RDIconEngine::Record',
'RDIconEngine::Download' and 'RDIconEngine::Upload' icons to
'RDIconEngine.
* Added 'RDMatrixListModel'.
* Refactored the 'Rivendell Switcher List' dialog in rdadmin(1) to
use the model-based API.
Signed-off-by: Fred Gleason <fredg@paravelsystems.com>