Version 1.8
The encoding used when reading the configuration file is now set by
default to UTF-8, eliminating problems when this file is in UTF-8
and the system enocidng is not (as on MS Windows).
If the output encoding is set in the configuration file using
the "Encoding" parameter, this encoding is used to read the
rest of the configuration file. This permits configuration files to
use encodings other than UTF-8 and distinct from the system encoding.

The Iwidgets library is now optional. Its presence is detected. If it is
not present, custom character charts are not available.

Version 1.7 allows the results to be saved in a variety of encodings.

Version 1.6 correctly computes even extremely large numbers of words.
The configuration system has been improved. The colors of the main
components are now configurable, configuration files are now read automatically,
and parameter names are matched more liberally.
