* Added a '<fadedownGain>' parameter to the return of the 'ListLog'
web API call.
* Added 'FADEUP_GAIN' and 'FADEDOWN_GAIN' parameters to the 'SaveLog'
web API call.
* Modified 'lib/rdformpost.cpp' to use read-only accessors for
std::map values.
* Added a check for valid event IDs for the 'SaveLog' method in
'web/rdxport/logs.cpp'.
* Added an 'AddLog' method to the Web API.
* Added an 'DeleteLog' method to the Web API.
* Added a 'SaveLog' method to the Web API.
* Added 'eventLength', 'linkEventName', 'linkStartSlop',
'linkEndSlop', 'linkId', 'linkEmbedded', 'extStartTime',
'extLength', 'extCartName', 'extData', 'extEventId',
and 'extAnncType' XML fields to the return of the ListLog web
API method