0.6.4 changes undocumented.
goffice 0.6.3:
Hiroyuki Ikezoe:
* Switch from pcre to glib regexp handling. [#482319]
Jean:
* Don't try to use invalide data in box-plots. [#527249]
* Add EPS export for charts if cairo supports.
Jody:
* Enable the use of dolt.
* Fix formats on win32.
Morten:
* Add go_format_is_invalid.
* Improve date convention framework.
* Fix problem with [Enter] causing infinite recursion.
which(1) in a Makefile part provided by gtk-doc by a newer version
(which is still not portable, but since that gtk-doc stuff is used
at many places there is no point in introducing something better here)