Creates a new instance of the StatisticsReader class. All parameters--ArchiveFilePath, StateFilePath, IntercomFilePath, MetadataFilePath, StartTime, and EndTime--must be set manually before attempting to read statistics from the archive.

Creates a new instance of the StatisticsReader class. The configuration file specified in the parameter must contain the statistics historian records in order to automatically locate the archive files. Otherwise, the other constructor should be used. The StartTime and EndTime parameters are not set when using this constructor and must be set manually before attempting to read statistics from the archive.