* Dropped the 'ENCODERS', 'ENCODER_BITRATES', 'ENCODER_BITRATES'
and 'ENCODER_CHANNELS' tables from the database.
* Incremented the database version to 331.
* Removed the 'RDSettings::customCommandLine()',
'RDSettings::setCustomCommandLine()' and
' RDSettings::resolvedCustomCommandLine()' methods.
Signed-off-by: Fred Gleason <fredg@paravelsystems.com>