* Fixed a bug in 'web/rdxport/carts.cpp' and 'web/rdxport/import.cpp'
that caused the 'EditCart' web API call to return an error when
attempting to set the Title field to its current value when
Allow Duplicate Cart Titles was not enabled.
* Added a 'SYSTEM.FIX_DUP_CART_TITLES' field to the database.
* Incremented the database version to 264.
* Added 'RDSystem::fixDuplicateCartTitles()' and
'RDSystem::setFixDuplicateCartTitles()' methods in 'lib/rdsystem.cpp'
and 'lib/rdsystem.h'.
* Added an 'Auto-Correct Duplicate Cart Titles' checkbox to the
'System Settings' dialog in 'rdadmin/edit_settings.cpp' and
'rdadmin/edit_settings.h'.
* Modified the 'EditCart' web call to enforce the 'Auto-Correct
Duplicate Cart Titles' setting.
* Fixed a bug in 'lib/rdcart.cpp' that caused the 'Import' web API call
to return 404 when importing with 'CREATE' set to '1' and unique titles
enabled in the database.
* Added 'RDCart::xmlSql()' and second 'RDCart::xml()' methods.
* Refactored the 'RDCart::xml()' method to use a SQL query.
* Refactored the Cart and Cut web methods in 'web/rdxport/carts.cpp'
to use SQL queries.
* Added rdxml_parse_test(1) in 'tests/'.
* Added a RDCart::readXml()' method in 'lib/rdcart.cpp' and
'lib/rdcart.h'.
* Fixed a typo in the 'averageSegueLength' field in the 'RDCart::xml()'
method in 'lib/rdcart.cpp'.
* Removed the 'validity' field from the output of the 'RDCart::xml()'
method in 'lib/rdcart.cpp'.
* Removed the 'validity' and 'localCounter' fields from the output
of the 'RDCut::xml()' method in 'lib/rdcut.cpp'.
* Update web test methods in 'web/tests/'.
* Added an 'RDSchedCode' class in 'lib/rdschedcode.cpp' and
'lib/rdschedcode.h'.
* Implemented the 'ListSchedCodes' web method in
'web/rdxport/schedcodes.cpp'.
* Implemented the 'AssignSchedCode' web method in
'web/rdxport/schedcodes.cpp'.
* Implemented the 'UnassignSchedCode' web method in
'web/rdxport/schedcodes.cpp'.
* Implemented the 'ListCartSchedCodes' web method in
'web/rdxport/schedcodes.cpp'.
* Extended 'RDGetWebTime()' and 'RDGetWebDateTime()' functions to
support XML 'xs' namespace formats.
* Implemented '*_POINT' fields in the 'EditCut' web method in
'web/rdxport/carts.cpp'.
* Modified the 'RDCart::removeSchedCode()' method so as to treat
scheduler codes in a case-insensitve manner.
* Modified the return of the 'EditCut' web method to provide a full
<cutList> record in 'web/rdxport/carts.cpp'.
* Added a 'CART.USE_WEIGHTING' field to the database.
* Added a 'CUTS.PLAY_ORDER' field to the database.
* Incremented the database version to 254.
* Added a 'Schedule Cuts By' control to the Edit Cart dialog in
'rdlibrary/edit_cart.cpp' and 'rdlibrary/edit_cart.h'.
* Added 'RDCart::useWeighting()' and 'RDCart::setUseWeighting()'
methods in 'lib/rdcart.cpp' and 'lib/rdcart.h'.
* Added 'RDCut::playOrder()' and 'RDCut::setPlayOrder()' methods
in 'lib/rdcut.cpp' and 'lib/rdcut.h'.
