[gtkada] Porting gate to glade2

[Arnaud Charlet]

> One question thought: I use spaces for tabs is that ok? It looks like

We never use tabs.

> you are using 3 spaces is this correct?

Right.

I'd strongly suggest that you build with -gnaty -gnatwulrkmje

Actually you should simply create a file .devel in your gtkada/src directory,
that will put you in developer mode, and compile files following our
coding standards.

Arno