UserReportException.php: Added field SYSTEM_REPORT_COLUMN_NAME to output. Array members renamed to SYSTEM_*.
Various files adjusted to inlcude renamed file `UserFormException.php`.
Link.php: Mamut switch() in parseItem() refactored to use $callTable.
Report.php: refactoring started to use UserReportException() instead of SyntaxReportException. Startet removing all fr_error usages.