gtkmm-1.3 code generation

I have continued to clean up the gtkmm-1.3 code-generation perl code. It now uses
jamesh‘s more up-to-date and standardised
gtk.defs interface-definition files, so that’s another large
problem out of the way. I am now much more optimistic that
we can gradually put all necessary pieces together.

I turned down a Windows project at the company, for
obvious reasons. When I asked the project manager why they
couldn’t use Unix instead he explained that then they’d have
to give the source code away. Irredeemably inept.