No need of is_id_arg() anymore in pdb/lib.pl. Let's reuse the {id}
value. Also I had to add an additional trick for GimpDisplay which we
will now generate as such in libgimp PDB files, but still need to show
as GimpObject on app/pdb/.
As previously, only the new classes and the PDB generation for a first
step.
and simply add them to the list of "compat_procs" which have a
replacement with identical signature. Move the libgimp C functions to
non-generated files.
that have a replacement with identical signature. Register them as
compat aliases with the PDB instead. Implement the libgimp API
manually, calling the new item functions.