bugs:

* tile ewidth has the e for a reason! which one? check!

important issues:

* implement PF_IMAGE, PF_DRAWABLE etc... either in perl or make
  gimpui.h somehow available (hmm...)
  (wait for the next Gtk version)

*drawable* functions
*tile* functions
*region* functions

not-so-important issues:

* return values for run()
* default function parameters (with hash %defaults?)
* gimp_text(text => "hallo", family => "engraver", size => 20);

* unimplemented functions:
  
  gimp_query_procedure(proc_name, proc_blurb, proc_help, proc_author, proc_copyright, proc_date, proc_type, nparams, nreturn_vals, params, return_vals)
  gimp_channel_get_show_masked(channel_ID)
  gimp_channel_set_show_masked(channel_ID, show_masked)
  gimp_pixel_rgns_register(nrgns, ...)
  gimp_pixel_rgns_process(pri_ptr)

