[Webnucleo] ANNOUNCE: libnucnet 0.21 is now publicly available

[Announce list for the Webnucleo project.]

Release 0.21 of Webnucleo's libnucnet Module is now publicly available.
Libnucnet is a library of codes for storing and managing nuclear reaction
networks (that is, collections of nuclei and reactions among them). The
module is available at this location:

http://www.webnucleo.org/home/modules/libnucnet/0.21

  Below are the recent updates to the module:

        Fix:
        Libnucnet__Reaction__copy() now correctly copies the duplicate
reactant and product factors.