New import/export framework

[Leonard Rosenthol]

> yes but miss some feature of some fileformat with the current system :
> - we can't use layer in png/psd/gimp...
> - we can't set the level of compression
>

	ImageMagick's API's fully support getting & setting individual layers of
formats such as PSD, GIMP, etc.  (PNG doesn't do layers, though MNG does,
and that works fine with IM).

	Maybe you are just calling it correctly?!?!?


Leonard