Description: subclass that gets the field names from the first header line
and contains some common preconfiguration
User: roman.stumm
Date: 28.08.2007
Time: 17:28:52
Description: Interface of a reader used by LineImporterSpec to
read from a reader or stream record-by-record (line-by-line)
User: roman.stumm
Date: 11.06.2008
Time: 17:42:47