[Vala] True vala introspection

[Sam Liddicott <sam liddicott com>]

Please could vapigen generate the vala equivalent of it's C gir input files?

They would describe namespaces and classes, methods and CCode attributes so that offline tools could generate correct vala code.

Maybe also valac should have the option to do the same

Such files would also be the basis for automaticly generating vala api documentation.

Sam