* Changed the result code of the 'AddCart' service when the cart
already exists from '403' to '400'.
* Changed the result code of the 'EditCart' service when attempting
to set a forced length on a macro cart from '403' to '400'.
* Changed the result code of the 'EditCart' service when attempting
to set a forced length outside of the valid range from '403' to '400'.
* Changed the result code of the 'Export' service when attempting
to export from a cut with no audio content from '403' to '404'.
* Changed the '401' result code of the 'EditCart' service to be 403.
* Changed the '401' result code of the 'DeleteAudio' service to be 403.
* Changed the '401' result code of the 'Export' service to be 403.
* 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.
* 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 'Type' control to 'web/tests/listcart.html'.
* Fixed a bug in 'web/rdxport/carts.cpp' that broke the 'ListCarts'
API call when no group was specified.
