0.1.6: backconvert & re-format (2007-03-05)
   - ISBN::convert() converts ISBN-13 to ISBN-10 (and ISBN-10 to ISBN-10) as 
     well.
   - new public ISBN->getISBNDisplayable() for all kind of formatting needs.

0.1.5: "french kiss" (2007-03-03)
   - updated isbn data (as of 2007-03-03)
   - updated codegen to produce csv formed data
   - external isbn-data put into file data/groups.csv (as suggested by 
     Philippe Jausions and Stefan Kilp)
   - comparison bug fixed, wrong verifcation solved [10:2020478447] (thanks to
     Frans van de Pol)
   - tests extended to reflect these problems and the range of iran

0.1.4: pearifying (2007-01-19)  
   - proper licensing
   - file format fix
   - metadata fix
   - added XML and HTML documentation
      
0.1.3: code improvements again 
   - fixed typo strign / string ~1280
   - beautified Function Definitions
   - wordwrap array data (tools)
   - added PEAR_Exception and extended it with ISBN_Exception
   - upgraded to phpcs 0.3.0 and used it

0.1.2: code improvements
   - double to single quotes

0.1.1: code cleaning
   - removing all errors reported by phpcs (ignoring camel caps errors on 
     certain "ISBN" functions)
   - removing all errors reported by phpDocumentor version 1.3.1

0.1.0: inital release
   - 2007-01-01 calls for ISBN-13