* Added an 'AUDIO_INPUTS.LABEL' field to the database.
* Added an 'AUDIO_OUTPUTS.LABEL' field to the database.
* Incremented the database version to 350.
* Added 'RDAudioPort::inputPortLabel()',
'RDAudioPort::setInputPortLabel()' 'RDAudioPort::outputPortLabel()'
and 'RDAudioPort::setOutputPortLabel()' methods.
* Added 'Label' fields to the 'Input Port' and 'Output Port'
sections of the 'Edit Audio Ports' dialog in rdadmin(1).
* Added code to rdairplay(1) to use port labels on audio meters.
Signed-off-by: Fred Gleason <fredg@paravelsystems.com>