2005-04-12  Raphael Quinet  <raphael@gimp.org>

	* configure.in: updated test for libjpeg so that it requires
	version 6b (27-Mar-1998) or later.

	* plug-ins/jpeg/jpeg.h
	* plug-ins/jpeg/jpeg.c
	* plug-ins/jpeg/jpeg-load.c
	* plug-ins/jpeg/jpeg-save.h
	* plug-ins/jpeg/jpeg-save.c: added support for loading and saving
	XMP packets in JPEG APP1 markers, simplified the code that reads
	comments from COM markers and removed #ifdef HAVE_PROGRESSIVE_JPEG
	because we require jpeg-6b, which includes progressive support.