since that's all we really need. Changes from version 0.17:
* Guile-gtk now supports new guile 1.4
* Guile-gtk now calls gtk_set_locale during initialization.
* Support for type conversions with composites due to libltdl support from
libguile.
* Lots of improvements with the build-guile-gtk script.
* Functions for getting the Gtk+ and guile-gtk version.
* Lots of additions and corrections to the *.defs files.
* The usual, uncountable number of minor and major bug fixes.
