[gtkada] Documentation generation tool

[Arnaud Charlet]

> Would be a good idea to distribute it under the name, say, AdaDoc? :)

Certainly an interesting idea, but as you noted, requires some work so that
proper documentation and packaging are done.

We don't have the resources at this time to do it, but this is definitely
something that is on our todo list.

If anyone would like to help accelerating this process, we will be happy
to coordinate this effort.

Arno