gtk-doc resolution-independen branch

[Stefan Kost <ensonic hora-obscura de>]

hi,

saw your changes for res-indep gtk branch for gtk-doc. I'd like to discuss how
we can handle this better in gtk-doc by using some sort of plugins. gtk+ itself
has some gtk-specific support in gtk-doc, but e.g. gstreamer has lots of gobject
things that could get some special doc treatment.

Ideally gtk-doc itself only knows about gobject and all the gtk-specific things
go to a module (that could be active by default for backwards compat). gstreamer
things go to a gst module. modules can be activated/deactivated in Makefile.am.

I don't have thought this any deeper though.

Stefan