[gtkada] Porting gate to glade2

[Arnaud Charlet]

> Just want to say that the port is getting along, but that there still is
> more to do. After some heavy usage of GVD I think I have gotten the most
> general procedures/function to work now. What remains is to make sure
> this is robust and all the special functions/routines for generating the
> code for the different widgets.
> 
> I also made a Find_Tag_With_Attribute routine for glib.xml as I need to
> find the node that contains the attribute I'm looking for.

Looks good to me!
If you want to start sending some of your changes for review, do not hesitate.
It would be nice to spot any potential major incompatibilities with e.g. our
coding style before you've done all the work.

Arno