2004-07-26  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpdatafactory.h: added "gboolean writable" to the
	GimpDataFactoryLoaderEntry struct. Return a GList* instead of
	GimpData* from GimpDataLoadFunc so it's possible to load more than
	one data object from one file.

	* app/core/gimpdatafactory.c (gimp_data_factory_load_data):
	changed accordingly: add all items of the returned lists to the
	data factory. Make the data object writable only if it's in the
	writable path *and* its loader entry says it's a writable format
	*and* the returned list contains exactly one element.

	* app/core/gimp.c (gimp_real_initialize): declare all loader
	entries as writable where we have code to read and write exactly
	one object per file; all others are not writable.

	* app/core/gimpbrush.[ch]
	* app/core/gimpbrushgenerated.[ch]
	* app/core/gimpbrushpipe.[ch]
	* app/core/gimpgradient-load.[ch]
	* app/core/gimppalette.[ch]
	* app/core/gimppattern.[ch] (all load functions): return a list
	containing the loaded object instead of the object itself.