Refactoring the EPDL97DataProcessor class. This class has now been split into two classes: the ENDLIB97FileHandler class and the DataProcessor base class. The ENDLIB97FileHandler class has only one responsibility - read data from the ENDLIB97 tables. No additional processing is done by this class. The DataProcessor base class converts the data to log-log format, creates continuous and discrete cdfs and swaps data in two tuple members.