gimp-item-find-parasite -> gimp-item-get-parasite
gimp-item-list-parasites -> gimp-item-get-parasite-list
Also changed the signature of gimp-item-get-parasite-list's C wrapper
in libgimp to be sane.
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.