Changes in version 0.2.3 (2013-11-09)                  

    o   silly typo in Au_JC demo

                 Changes in version 0.2.2 (2013-05-19)                  

    o   cleaning examples for CRAN

    o   amorphous Si

                        Changes in version 0.2.1                        

    o   NEWS added

    o   units are in nm