* Removed drop of the 'RECORDINGS.SAMPRATE' field from schema
change 285.
* Cleaned up SQL calls in rdcatchd(8).
* Cleaned up SQL calls in 'RDStation'.
* Cleaned up SQL calls in 'RDLibraryConf'.
* Cleaned up SQL calls in 'RDLogeditConf'.
* Cleaned up SQL calls in 'RDLogLine'.
* Cleaned up SQL calls in 'RDSvc'.
* Cleaned up SQL calls in rivendell_filter(1).
* Added a 'RDLIBRARY.READ_ISRC' field to the database.
* Incremented the database version to 245.
* Added 'RDLibraryConf::readIsrc()' and 'RDLibraryConf::setReadIsrc()'
methods in 'lib/rdlibrary_conf.cpp' and 'lib/rdlibrary_conf.h'.
* Added a 'Read ISRCs from CD' control to the 'Edit RDLibrary' dialog
in 'rdadmin/edit_rdlibrary.cpp' and 'rdadmin/edi_rdlibrary.h'.
* Implemented the 'Read ISRCs from CD' option in the full disc
ripper in 'rdlibrary/disk_ripper.cpp'.
* Implemented the 'Read ISRCs from CD' option in the per-track disc
ripper in 'rdlibrary/cdripper.cpp'.